Question

【题目】用since或for

【1】We have learned five lessons ________ the beginning of this term.

【2】Mrs Liao has been in hospital ________last week.

【3】I have stayed at my aunt’s ________two weeks.

Answer 1

【答案】

【1】since

【2】since

【3】for

【解析】

【1】句意：自从这个学期初，我已经学了五课。since表示自从，引导现在完成时。根据题意，故填since。

【2】句意：Mrs Liao自从上周酒已经住在医院里了。since last week。根据句意及所给单词提示，故填since。

【3】句意：我已经呆在姑姑家两周了。for+一段时间。根据题意，故填for.

for用来说明动作持续时间长度。

I have lived here for more than twenty years.

I have lived here since I was born..

My aunt has worked in a clinic since 1949.