2016年職稱英語衛(wèi)生類語法輔導：復合句

1.陳述部分用had better +原形動詞表示建議時，問句部分用hadn't +主語形式。

①You'd better tell him about the matter,hadn't you?

②We had better do it by ourselves,hadn't we?

2.陳述部分用used to +主語時，問句部分用didn't + 主語？或usedn't +主語形式。

①He used to live in the country,didn't he?/usedn't he?

②They used to be good friends,didn't they?/usedn't they?

3.陳述部分用must(may,might) + have + V-ed表示推測時，若句中帶有明顯的過去時間的狀語，問句部分動詞用過去時形式。如：

①He might have forgotten his pen in the classroom yesterday,didn't he?（不用mightn't he?/hasn't he?）

②You must have got up late this morning,didn't you?（不用mustn't you?/haven't you?）

4.陳述部分用must(may,might) + have + V-ed表示推測時，若句中沒有帶明顯的過去時間的狀語，問句部分動詞用現在完成時形式。如：

①Everyone must have known the death of the waitress,haven't they? （不用mustn't they?）

②You must have worked there a year ago,didn't you?（不用mustn't you?/ haven't you?）

5.陳述部分的主語為從句時，問句部分的主語一般用it代替，如：

①What he said is true,isn't it? （不用didn't he?）

②Where we will build the dam has not been decided yet,has it? （不用won't we?）

6.陳述部分的主語為動名詞或不定式時，問句的主語用it代替。如：

①To do one good deed is easy for a person,isn't it?

②Skating is your favorite sport,isn't it?

7.陳述部分的主語是不定代詞one，反義疑問句的主語可以用one，也可以用you。如：One should be ready to help others,shuldn't one?