英語時(shí)態(tài)問題是許多同學(xué)的一個(gè)難題，本文整理了一些英語練習(xí)題，并附上了詳細(xì)的解析，希望大家有所收獲。

1.Years ago we didn’t know this, but recent science _________ that people who don’t sleep well soon get ill. A. showed B. has shown C. will show D. is showing
解析：答案選 B。由表示對(duì)照的Years ago和recent可知，“以前不知”，但“現(xiàn)在已經(jīng)證明了”，所以用現(xiàn)在完成時(shí)。
2.He was hoping to go abroad but his parents _________ that they won’t support him unless he can borrow money from the bank.
A. were deciding B. have decided C. decided D. will decide
解析：答案選B。因賓語從句中的時(shí)態(tài)是一般將來時(shí)，主句中的謂語動(dòng)詞不可能是過去時(shí)態(tài)，排除選項(xiàng)A和C；由語境判斷，不是“將要決定”，而是“現(xiàn)在已經(jīng)決定”，所以排除D，而選B。
3.The country life he was used to _________ greatly since 1992.
A. change B. has changed C. changing D. have changed
解析：答案選 B。since 1992這類時(shí)間狀語通常與現(xiàn)在完成時(shí)連用。主句主語是the country life，句中he was used to是省略了關(guān)系代詞that的定語從句。
4.He _________more than 5,000 English words when he entered the university at the age of 15. A. has learned B. would have learned C. learned D. had learned
解析：答案選 D。因?yàn)樯洗髮W(xué)是過去，學(xué)了五千個(gè)英語單詞是在上大學(xué)之前，即“過去的過去”，所以用過去完成時(shí)。
1. Months ago we sailed ten thousand miles across this open sea, which _________ the Pacific, and we met no storms. A. was called B. is called C. had been called D. has been called
解析：答案選 B。因?yàn)檫@是客觀事實(shí)，故用一般現(xiàn)在時(shí)。 注：有關(guān)一般現(xiàn)在時(shí)的另一個(gè)考點(diǎn)是，在時(shí)間狀語從句和條件狀語從句中，要用一般現(xiàn)在時(shí)表示將來意義，而不能直接用將來時(shí)態(tài)。此時(shí)要特別注意的是，命題人有可能會(huì)設(shè)置形式上與狀語從句相似且容易混淆的賓語從句作為命題切入點(diǎn)。
2.“What would you do if it _________tomorrow?” “We have to carry it on, since we’ve got everything ready.” A. rain B. rains C. will rain D. is raining
解析：答案選 B。即在條件句中用一般現(xiàn)在時(shí)表示將來意義。
3.As soon as he comes back, I’ll tell him when _________and see him.
will come B. will you come C. you come D. do you come
解析：答案選 A。when 引導(dǎo)的是賓語從句，不是狀語從句。