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人教八年级上册英语Unit3-4词形变化专项训练
【基础题（★）—— 单元核心词汇+基础时态】
考点1：Unit3比较类词汇·形容词/副词比较级（规则/不规则变形）
Tom is ______ (tall) than his brother, so he sits behind him in class.
This storybook is ______ (interesting) than the one I read last week.
She runs ______ (fast) than any other girl in her class.
My mother cooks ______ (well) than my father—her dishes are more delicious.
The weather today is ______ (warm) than yesterday; we can go for a walk.
He studies ______ (hard) than before because he wants to get better grades.
This park is ______ (beautiful) than the city square, with more flowers and trees.
Lucy speaks English ______ (clearly) than Lily, so the teacher often asks her to answer questions.
The math problem is ______ (easy) than the last one; I solved it quickly.
My new schoolbag is ______ (heavy) than the old one—it can hold more books.
考点2：Unit4动植物类词汇·一般现在时（第三人称单数/动词原形）
The panda ______ (eat) bamboo leaves every day; it’s its favorite food.
Many birds ______ (fly) to the south when winter comes.
This kind of plant ______ (grow) well in sunny places.
My grandfather ______ (feed) the chickens in the yard every morning.
We ______ (visit) the zoo every month to see the amazing animals.
The monkey ______ (climb) trees quickly and plays with other monkeys.
These flowers ______ (bloom) in spring and look very pretty.
The lion ______ (sleep) for about 18 hours a day; it’s a lazy animal.
I ______ (like) watching documentaries about rare plants and animals.
My sister ______ (draw) pictures of animals in her notebook every weekend.
【提升题（★★）—— 词形变化进阶】
考点3：名词单复数（规则/不规则变形）
There are many different ______ (kind) of birds in the forest.
We saw two ______ (deer) when we were hiking in the mountains.
These ______ (leaf) turn yellow in autumn and fall off the trees.
The farmer grows some ______ (potato) and ______ (tomato) in his field.
There are three ______ (child) looking at the pandas in the zoo.
I bought some ______ (book) about amazing plants from the bookstore.
The ______ (family) in this village often go to the forest to pick wild fruits.
Those ______ (knife) are used to cut branches of plants for experiments.
We visited some ______ (city) famous for protecting rare animals.
The ______ (baby) pandas are very small and cute when they are born.
考点4：动词时态混合（一般现在时vs一般过去时）
He ______ (be) interested in plants now, but he ______ (not like) them when he was young.
They ______ (visit) the wildlife park every year, and they ______ (see) a tiger last month.
My mother ______ (grow) roses in the garden every year; she ______ (plant) ten new ones last week.
The bird ______ (sing) beautifully every morning, but it ______ (not sing) yesterday because of the rain.
I ______ (read) a book about different animals every night, and I ______ (finish) a wonderful one last week.
She ______ (know) a lot about pandas now, but she ______ (not know) anything about them two years ago.
We ______ (go) to the botanical garden every summer, and we ______ (take) many photos there last year.
The monkey ______ (eat) bananas every day; it ______ (eat) three bananas yesterday afternoon.
My brother ______ (play) with his pet dog every afternoon; he ______ (play) with it for two hours last Sunday.
The plant ______ (need) a lot of water every day; we ______ (water) it twice yesterday.
考点5：形容词→副词（规则/特殊变形）
The scientist studied the plant ______ (careful) to find out its growth rule.
The bird flew ______ (high) in the sky and disappeared soon.
She answered the teacher’s question about animals ______ (quick) and correctly.
My father drives ______ (slow) when passing through the forest area.
The children watched the pandas ______ (happy) as they ate bamboo.
He speaks about rare plants ______ (clear), so everyone can understand him.
The workers planted the young trees ______ (careful) to make sure they can grow well.
The rabbit ran ______ (fast) when it saw a dog nearby.
She sings songs about animals ______ (beautiful); her voice is very sweet.
We listened ______ (careful) to the guide’s introduction about the amazing plants.
【拓展题（★★★）—— 综合运用】
考点6：否定句的动词形式（多时态）
He ______ (not like) scary animals, so he never goes to the snake house in the zoo.
They ______ (not visit) the botanical garden last weekend because it rained heavily.
My sister ______ (not watch) documentaries about plants—she prefers cartoons.
We ______ (not have) enough time to see all the animals in the zoo yesterday.
The plant ______ (not grow) well in dark places; it needs sunlight.
She ______ (not finish) reading the book about rare animals yet, but she will finish it soon.
He ______ (not feed) the birds in the park yesterday because he forgot to bring food.
These animals ______ (not live) in cold areas; they like warm weather.
I ______ (not know) that this plant can bloom at night until my teacher told me.
They ______ (not go) hiking in the forest last month because of the bad weather.
考点7：时态+词性混合（综合考点）
There ______ (be) many ______ (danger) animals in the rainforest, but we can see them in zoos safely.
My brother ______ (not do) well in the biology exam last time, so he ______ (study) ______ (hard) now to learn more about plants and animals.
We ______ (have) a ______ (wonder) trip to the wildlife park last Saturday and saw many rare animals.
The ______ (science) studies plants ______ (careful) and ______ (find) new facts about their growth every year.
I ______ (not know) how to ______ (protect) wild animals before, but now I can give ______ (use) advice to my friends.
She ______ (speak) ______ (clear) about the ______ (amaze) plants in the Amazon when she gave a report yesterday.
Those ______ (child) ______ (play) ______ (happy) with the small animals in the petting zoo and didn’t want to leave.
The ______ (guide) in the botanical garden ______ (introduce) the rare plants ______ (polite) to us last Sunday.
We ______ (visit) some ______ (interest) places with many ancient plants and took ______ (many) photos than we expected.
He ______ (become) a ______ (success) biologist because he ______ (work) ______ (hard) and loves studying amazing plants and animals.
【参考答案及解析】
基础题（★）
考点1：Unit3比较类词汇·形容词/副词比较级
taller（tall为单音节词，比较级直接加er）
more interesting（多音节词，比较级加more）
faster（fast为单音节词，比较级直接加er）
better（well的不规则比较级）
warmer（warm为单音节词，比较级直接加er）
harder（hard为单音节词，比较级直接加er）
more beautiful（多音节词，比较级加more）
more clearly（clearly为多音节副词，比较级加more）
easier（easy以“辅音+y”结尾，变y为i加er）
heavier（heavy以“辅音+y”结尾，变y为i加er）
考点2：Unit4动植物类词汇·一般现在时
eats（第三人称单数，加s）
fly（主语为复数，用原形）
grows（第三人称单数，加s）
feeds（第三人称单数，加s）
visit（主语为复数，用原形）
climbs（第三人称单数，加s）
bloom（主语为复数，用原形）
sleeps（第三人称单数，加s）
like（主语为I，用原形）
draws（第三人称单数，加s）
提升题（★★）
考点3：名词单复数
kinds（规则复数，加s）
deer（单复数同形）
leaves（leaf的不规则复数，变f为v加es）
potatoes；tomatoes（以o结尾的有生命名词，加es）
children（child的不规则复数）
books（规则复数，加s）
families（以y结尾，变y为i加es，此处指多个家庭）
knives（以fe结尾，变fe为v加es）
cities（以y结尾，变y为i加es）
babies（以y结尾，变y为i加es）
考点4：动词时态混合
is；didn’t like（前半句一般现在时，主语单数用is；后半句一般过去时否定）
visit；saw（前半句一般现在时，主语复数用原形；后半句一般过去时，see的过去式为saw）
grows；planted（前半句一般现在时，第三人称单数加s；后半句一般过去时，plant的过去式为planted）
sings；didn’t sing（前半句一般现在时，第三人称单数加s；后半句一般过去时否定）
read；finished（前半句一般现在时，主语为I用原形；后半句一般过去时，finish的过去式为finished）
knows；didn’t know（前半句一般现在时，第三人称单数加s；后半句一般过去时否定）
go；took（前半句一般现在时，主语复数用原形；后半句一般过去时，take的过去式为took）
eats；ate（前半句一般现在时，第三人称单数加s；后半句一般过去时，eat的过去式为ate）
plays；played（前半句一般现在时，第三人称单数加s；后半句一般过去时，play的过去式为played）
needs；watered（前半句一般现在时，第三人称单数加s；后半句一般过去时，water的过去式为watered）
考点5：形容词→副词
carefully（careful变副词加ly）
high（high作副词时形式不变，表“高地”）
quickly（quick变副词加ly）
slowly（slow变副词加ly）
happily（happy变y为i加ly）
clearly（clear变副词加ly）
carefully（careful变副词加ly）
fast（fast作副词时形式不变，表“快速地”）
beautifully（beautiful变副词加ly）
carefully（careful变副词加ly）
拓展题（★★★）
考点6：否定句的动词形式
doesn’t like（一般现在时第三人称单数否定，借助doesn’t）
didn’t visit（一般过去时否定，借助didn’t）
doesn’t watch（一般现在时第三人称单数否定，借助doesn’t）
didn’t have（一般过去时否定，借助didn’t）
doesn’t grow（一般现在时第三人称单数否定，借助doesn’t）
hasn’t finished（现在完成时否定，have+not+过去分词）
didn’t feed（一般过去时否定，借助didn’t）
don’t live（一般现在时复数主语否定，借助don’t）
didn’t know（一般过去时否定，借助didn’t）
didn’t go（一般过去时否定，借助didn’t）
考点7：时态+词性混合
are；dangerous（前半句一般现在时，主语复数用are；danger形容词形式为dangerous）
didn’t do；studies；harder（前半句一般过去时否定；后半句一般现在时第三人称单数；hard的比较级为harder）
had；wonderful（前半句一般过去时，have的过去式为had；wonder形容词形式为wonderful）
scientist；carefully；finds（science变名词scientist“科学家”；careful副词形式为carefully；后半句一般现在时第三人称单数加s）
didn’t know；protect；useful（前半句一般过去时否定；protect为动词原形；use形容词形式为useful）
spoke；clearly；amazing（前半句一般过去时，speak的过去式为spoke；clear副词形式为clearly；amaze形容词形式为amazing“令人惊奇的”）
children；played；happily（child的复数为children；一般过去时play的过去式为played；happy副词形式为happily）
guide/guides；introduced；politely（wait变名词guide“导游”；一般过去时introduce的过去式为introduced；polite副词形式为politely）
visited；interesting；more（一般过去时visit的过去式为visited；interest形容词形式为interesting“有趣的”；many的比较级为more）
became；successful；works；hard（一般过去时become的过去式为became；success形容词形式为successful；一般现在时第三人称单数work变works；hard作副词不变形）

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