★以下是少兒英語頻道為大家整理的《三一口語考試六級語法學習》，供大家參考。更多內(nèi)容請看本站少兒英語頻道。
1. If 引導的條件句---第一條件句
形式：
If I am better tomorrow, I will get up.
If I have a headache, I will take an aspirin.
If she finishes early, she will go home.
用法：
第一類條件句從句中的動詞用一般現(xiàn)在時，主句中的動詞用will/shall 動詞原形。用來表示詢問或談論十分可能的事情。如果我們認為將來的事件可能會發(fā)生，就可以用第一條件句去描述將會發(fā)生什么事或不會發(fā)生什么事。
2. 過去進行時
形式：
過去進行時由was/were -ing 分詞構成。
I was writing.
We were writing.
用法：
①表示過去某時正在進行的動作。
What were you doing last night at seven o'clock?
Workers were building a dam last summer.
②與always 連用表示過去經(jīng)常重復的動作。
He was always changing his mind.
She was always coming back late.
3. 現(xiàn)在完成時
形式：
現(xiàn)在完成時是have/has ed分詞構成的。
I have (I've) played.
He has (He's) worked.
用法：
①表示動作或過程發(fā)生在說話之前某個沒有明確說出的過去時間，現(xiàn)在已經(jīng)完成了，并與現(xiàn)在的情況有聯(lián)系。
現(xiàn)在完成時可以不帶時間狀語。
She's turned off the light.(燈在一個過去時間被關了，說話時刻仍然關著。)
現(xiàn)在完成時可以表示最近發(fā)生的動作。
She's already gone.
It's rained quite recently.
現(xiàn)在完成時可以表示反復性和習慣性動作。
We have often been there.
I've seen the film three times a month.
②表示開始于過去并持續(xù)到現(xiàn)在(也許還會持續(xù)下去)的動作。
現(xiàn)在完成時和“直到現(xiàn)在”的狀語連用。
Up till now we have planted over 24,000 fruit trees.
So far everything has been successful.
現(xiàn)在完成時與since 和 for 連用。
I've known him since 1950.
I haven't smoked a cigarette for a year
1. If 引導的條件句---第一條件句
形式：
If I am better tomorrow, I will get up.
If I have a headache, I will take an aspirin.
If she finishes early, she will go home.
用法：
第一類條件句從句中的動詞用一般現(xiàn)在時，主句中的動詞用will/shall 動詞原形。用來表示詢問或談論十分可能的事情。如果我們認為將來的事件可能會發(fā)生，就可以用第一條件句去描述將會發(fā)生什么事或不會發(fā)生什么事。
2. 過去進行時
形式：
過去進行時由was/were -ing 分詞構成。
I was writing.
We were writing.
用法：
①表示過去某時正在進行的動作。
What were you doing last night at seven o'clock?
Workers were building a dam last summer.
②與always 連用表示過去經(jīng)常重復的動作。
He was always changing his mind.
She was always coming back late.
3. 現(xiàn)在完成時
形式：
現(xiàn)在完成時是have/has ed分詞構成的。
I have (I've) played.
He has (He's) worked.
用法：
①表示動作或過程發(fā)生在說話之前某個沒有明確說出的過去時間，現(xiàn)在已經(jīng)完成了，并與現(xiàn)在的情況有聯(lián)系。
現(xiàn)在完成時可以不帶時間狀語。
She's turned off the light.(燈在一個過去時間被關了，說話時刻仍然關著。)
現(xiàn)在完成時可以表示最近發(fā)生的動作。
She's already gone.
It's rained quite recently.
現(xiàn)在完成時可以表示反復性和習慣性動作。
We have often been there.
I've seen the film three times a month.
②表示開始于過去并持續(xù)到現(xiàn)在(也許還會持續(xù)下去)的動作。
現(xiàn)在完成時和“直到現(xiàn)在”的狀語連用。
Up till now we have planted over 24,000 fruit trees.
So far everything has been successful.
現(xiàn)在完成時與since 和 for 連用。
I've known him since 1950.
I haven't smoked a cigarette for a year