内容正文:
动词的时态
(1) 一般现在时
用法 表示习惯性或经常性发生的动作或状态,也可表示普遍真理和自然规律。
标志词 often, usually, sometimes, always,seldom ,
every day, twice a week, how often
肯定式 ① 主 + 动词原形
② 主 + 动词 (-s / -es)
(主语是第三人称单数)
③ 主 + am / is / are + 表语 ① They often ride a bike to school.
② He usually walks to school.
③ I'm a boy.
否定式 ① 主 + don't + 动词原形
② 主 + doesn't + 动词原形
(主语是第三人称单数)
③ 主+am not / isn't / aren't+表语 ① They don't often ride a bike to school.
② He doesn't usually walk to school.
③ He is not a student.
疑问式 Do + 主 + 动词原形?
Does + 主 + 动词原形?
(主语是第三人称单数)
③ Am / Is / Are + 主 + 表语? ① Do they often ride a bike to school?
② Does he usually walk to school?
③ Are you free?
(2)一般过去时
用法 表示过去习惯性或经常性发生的动作或状态。
标志词 yesterday, last week, ago, just now,
in +过去的年份,the other day, this morning
肯定式 ① 主 + 动词过去式 (-ed)
② 主 + was / were + 表语 We saw a film last night.
She was a little girl 3 yeas ago.
否定式 主 + didn't + 动词原形
主+ wasn't / weren't+表语 We didn't see a film last night.
I wasn't at school yesterday.
疑问式 Did