现在完成时ppt课件.ppt

Present Perfect Tense--现在完成时
Present perfect tense 现在完成时
构成:
用法一:
Perfect Tense--现在完成时
Present perfect tense 现在完成时
构成:
用法一:
,也就是强调现在的影响和结果.
主语+have/has+过去分词
与一般过去时的区分
一般过去时：有表示过去时间点的提示词
. She bought two movie tickets yesterday.
His mother received great presents on mother's day.

，不能和具体的时间状语连用；
（last, ago, yesterday, etc. ）
present
past
I have lived here for two years
I lived there 2 years ago
. He had his breakfast at 6:00

He has had his breakfast.
2. When did you come here?

I watched the football match on TV at 9:00.
用法二：


for+段时间
since+点时间
since+句子（过去时）
. Kate has lived here for 3 years.
Kate has lived here since 3 years ago.
Kate has lived here since she came to China.
表示过去某个时间起先的动作或存在的状态，始终持续到现在并可能还将持续下去。动词运用持续性动词。常与for或since引导的时间连用
His father has died. (for 2 years)
The football match has begun.(since9:)
His father has been dead