2021屆高三英語重點詞匯與短語-
如：
we are not ready.我們沒準備好。
did it rain all day yesterday?昨天下了一天雨嗎？
what a fine day it is!多好的天氣啊!
②祈使語氣
表示說話人的建議、請求、邀請、命令等。
如：
be careful!小心!
don’t forget to close the window.別忘了關窗。
open the door, please.請打開門。
③虛擬語氣
表示動作或狀態不是客觀存在的事實，而是說話人的主觀愿望、假設或推測等。
如：
i were you, i should study english.如果我是你，我就學英語了。
i wish you could go with me.但愿你能同我們一起去。
may you succeed!祝您成功!
（二）虛擬語氣在條件從句中的用法
條件句有兩類，一類是真實條件句，一類是虛擬條件句。如果假設的情況是有可能發生的，就是真實條件句。在這種真實條件句中的謂語用陳述語氣。如：if it doesn?t rain tomorrow, we will go to the park.如果明天不下雨，我們就去公園。
如果假設的情況是過去或現在都不存在的，或將來不大可能發生的，則是虛擬條件句。
如：
if he had seen you yesterday, he would have asked you about it.如果他昨天見到你，他會問你這件事的。（事實上他昨天沒見到你，因此也未能問你這件事。）在含有虛擬條件句的復合句中，主句和從句的謂語都要用虛擬語氣。
（1）表示與現在事實相反的假設和結果
if i were you, i should (would, could, might) tell him the truth.
要是我是你，我就會（可能）對他說實話。
if he had time, he would (could, might) go with you.如果他有時間，他就會（可能）和你去。
if my brother were here, everything would be all right.要是我哥哥在這兒，一切都沒問題了。
（2）表示與過去事實相反的假設和結果
if you had taken my advice, you wouldn’t (couldn’t) have failed in the exam.
如果你按照我的建議去做，你一定不會（不可能考試不及格）。
if i had had the money last week, i should (would, could, might) have bought a car.
如果上星期有了這筆錢，我就會（可能）買1輛車。
she would(could,might) have telephoned you immediately, if she had won the game.
如果她比賽贏了，她就會(可能)給你打電話。
if you had come a few minutes earlier,you would(could,might) have met the famous singer.
如果你早來幾分鐘的話，你就會(可能會)見到那個著名的歌唱家。
(3)表示與將來事實可能相反的假設和結果
if it were sunday tomorrow, i should (would, could, might) go to see my grandmother.
如果明天是星期天，我就(可能)去看望我奶奶。
if it were to snow this evening,they would not go out.如果今晚下雪，他們將不出去了。
if it should rain, the crops would(could, might) be saved.
假如天下雨，莊稼就一定(有可能)得救。
（4）主、從句的動作發生時間不一致的情況