资源简介

一般过去时和现在完成时的比较
用法：
一般过去时表示过去某个时间发生的动作或状态，与现在没有关联。例如：I went to the park yesterday.（我昨天去了公园。）
现在完成时表示过去发生的动作或状态对现在的影响或结果。例如：I have been to the park three times this year.（今年我去过公园三次。）
强调点：
一般过去时更强调动作发生的时间点，说明某个事件在过去的某个时刻已经发生。例如：She left at 10 o’clock.（她10点离开了。）
现在完成时更强调动作对现在的影响或结果，说明某个事件在过去的某个时刻发生后，对现在还有影响或结果。例如：She has left for New York.（她已经去纽约了。）
时间状语：
一般过去时通常与表示过去的时间状语一起使用，如yesterday、last night、in 2020等。
现在完成时通常与表示现在的状语一起使用，如already、yet、so far、up to now等，或者与表示过去和现在的时间状语一起使用，如this morning、these days、in the past few years等。
否定句和疑问句的构成：
一般过去时的否定句和疑问句在助动词的后面加not或提问，例如：He didn’t go to the park yesterday.（他昨天没去公园。）Where did you go yesterday （你昨天去哪里了？）
现在完成时的否定句和疑问句在助动词的后面加not或提问，例如：He hasn’t been to the park yet.（他还没去过公园。）Have you been to the park yet （你去过公园了吗？）
表达的意思：
一般过去时只表示过去的动作或状态，与现在没有关联。例如：I had a headache last night.（我昨晚头疼。）
现在完成时可以表示动作或状态已经完成，并对现在产生影响或结果。例如：I have read the book.（我已经读完这本书了。
练习与巩固：
选择正确的时态填空：
a. I _____ (go) to the movies last weekend.
b. They _____ (not see) the movie yet.
c. We _____ (not finish) our homework yet.
d. She _____ (already) left for work.
e. They _____ (not have) any apples left.
将句子改为否定句：
a. I went to the park yesterday. (I didn't go to the park yesterday.)
b. We have finished our work. (We haven't finished our work yet.)
c. He has been to Europe before. (He hasn't been to Europe before.)
d. She had a cup of coffee this morning. (She didn't have a cup of coffee this morning.)
e. They haven't seen the movie yet. (They have seen the movie already.)
将句子改为疑问句：
a. We have been to New York before. (Have you been to New York before )
b. He hasn't had any breakfast yet. (Has he had any breakfast yet )
c. They didn't go to the concert last night. (Did they go to the concert last night )
d. She has written a letter to her friend. (Has she written a letter to her friend )
e. He went to the store this morning. (Did he go to the store this morning )
答案：
a. went
b. haven't seen
c. haven't finished
d. has already left
e. don't have
a. I didn't go to the park yesterday.
b. We haven't finished our work yet.
c. He hasn't been to Europe before.
d. She didn't have a cup of coffee this morning.
e. They haven't seen the movie yet. (They have seen the movie already.)改为肯定句：They saw the movie already!
a. Have you been to New York before
b. Has he had any breakfast yet
c. Did they go to the concert last night
d. Has she written a letter to her friend
e. Did he go to the store this morning

展开更多......

收起↑