1. if 引導(dǎo)的非真實(shí)性條件狀語(yǔ)從句 即虛擬語(yǔ)氣
通過(guò)動(dòng)詞形式的變化來(lái)表示說(shuō)話(huà)人對(duì)發(fā)生的動(dòng)作或存在的狀態(tài)所持的態(tài)度或看法的動(dòng)詞形式稱(chēng)為語(yǔ)氣，虛擬語(yǔ)氣表示說(shuō)話(huà)人所說(shuō)的話(huà)不是事實(shí)，而是一種祝愿，建議或是與事實(shí)相反的假設(shè)等。
If 引導(dǎo)的條件狀語(yǔ)從句分為真實(shí)和非真實(shí)條件句，非真實(shí)條件句應(yīng)用虛擬語(yǔ)氣。如果要表示與現(xiàn)在或?qū)?lái)事實(shí)相反時(shí)，其虛擬語(yǔ)氣結(jié)構(gòu)為：
句型條件從句主句
謂語(yǔ)動(dòng)詞形式動(dòng)詞過(guò)去式(be動(dòng)詞一律用were)would+動(dòng)詞原形
即：(從句)if +主語(yǔ)+動(dòng)詞過(guò)去式(be 動(dòng)詞用were), 一般過(guò)去時(shí)
(主句) 主語(yǔ)+would+動(dòng)詞原形 過(guò)去將來(lái)時(shí)
如：If I had time, I would go for a walk.
如果我有時(shí)間，我就會(huì)去散步。(事實(shí)上我現(xiàn)在沒(méi)有時(shí)間)
If I were you, I would take an umbrella.
假如我是你的話(huà)，我會(huì)帶上雨傘。(事實(shí)上我不是你)
I would say no if someone asked me to be in a movie.
假如有人請(qǐng)我當(dāng)電影演員，我會(huì)表示拒絕。(事實(shí)上瑞沒(méi)有人請(qǐng)我當(dāng)電影演員)
2. pretend to do sth. 假裝做某事 I pretended to sleep just now.
pretend to be doing sth. 假裝正在干某事
The students pretended to be writing when the teacher came in.
pretend +從句 假裝… I pretended that I fell asleep.
3. be late for 遲到 如：
I am late for work/ school/ class/ party.
4. a few 與 a little 的區(qū)別，few 與 little 的區(qū)別
⑴ a few 一些 修飾可數(shù)名詞
a little 一些 修飾不可數(shù)名詞 兩者表肯定意義
如：He has a few friends. 他有一些朋友。
There is a little sugar in the bottle. 在瓶子里有一些糖。
⑵ few 少數(shù)的 修飾可數(shù)名詞
little 少數(shù)的 修飾不可數(shù)名詞 但兩者表否定意義
如：He has few friends. 他沒(méi)有幾個(gè)朋友。
There is little sugar in the bottle.在瓶子里沒(méi)有多少糖。
5. hundred, thousand , million, billion (十億)詞前面有數(shù)詞或several
一詞時(shí)要不能加s ，反之，則要加s 并與of 連用，表示數(shù)量很多 如：several hundred/ thousand/ million/ billion people
幾百/千/百萬(wàn)/十億人 hundreds of trees 上百棵樹(shù)
通過(guò)動(dòng)詞形式的變化來(lái)表示說(shuō)話(huà)人對(duì)發(fā)生的動(dòng)作或存在的狀態(tài)所持的態(tài)度或看法的動(dòng)詞形式稱(chēng)為語(yǔ)氣，虛擬語(yǔ)氣表示說(shuō)話(huà)人所說(shuō)的話(huà)不是事實(shí)，而是一種祝愿，建議或是與事實(shí)相反的假設(shè)等。
If 引導(dǎo)的條件狀語(yǔ)從句分為真實(shí)和非真實(shí)條件句，非真實(shí)條件句應(yīng)用虛擬語(yǔ)氣。如果要表示與現(xiàn)在或?qū)?lái)事實(shí)相反時(shí)，其虛擬語(yǔ)氣結(jié)構(gòu)為：
句型條件從句主句
謂語(yǔ)動(dòng)詞形式動(dòng)詞過(guò)去式(be動(dòng)詞一律用were)would+動(dòng)詞原形
即：(從句)if +主語(yǔ)+動(dòng)詞過(guò)去式(be 動(dòng)詞用were), 一般過(guò)去時(shí)
(主句) 主語(yǔ)+would+動(dòng)詞原形 過(guò)去將來(lái)時(shí)
如：If I had time, I would go for a walk.
如果我有時(shí)間，我就會(huì)去散步。(事實(shí)上我現(xiàn)在沒(méi)有時(shí)間)
If I were you, I would take an umbrella.
假如我是你的話(huà)，我會(huì)帶上雨傘。(事實(shí)上我不是你)
I would say no if someone asked me to be in a movie.
假如有人請(qǐng)我當(dāng)電影演員，我會(huì)表示拒絕。(事實(shí)上瑞沒(méi)有人請(qǐng)我當(dāng)電影演員)
2. pretend to do sth. 假裝做某事 I pretended to sleep just now.
pretend to be doing sth. 假裝正在干某事
The students pretended to be writing when the teacher came in.
pretend +從句 假裝… I pretended that I fell asleep.
3. be late for 遲到 如：
I am late for work/ school/ class/ party.
4. a few 與 a little 的區(qū)別，few 與 little 的區(qū)別
⑴ a few 一些 修飾可數(shù)名詞
a little 一些 修飾不可數(shù)名詞 兩者表肯定意義
如：He has a few friends. 他有一些朋友。
There is a little sugar in the bottle. 在瓶子里有一些糖。
⑵ few 少數(shù)的 修飾可數(shù)名詞
little 少數(shù)的 修飾不可數(shù)名詞 但兩者表否定意義
如：He has few friends. 他沒(méi)有幾個(gè)朋友。
There is little sugar in the bottle.在瓶子里沒(méi)有多少糖。
5. hundred, thousand , million, billion (十億)詞前面有數(shù)詞或several
一詞時(shí)要不能加s ，反之，則要加s 并與of 連用，表示數(shù)量很多 如：several hundred/ thousand/ million/ billion people
幾百/千/百萬(wàn)/十億人 hundreds of trees 上百棵樹(shù)