现在完成时态.docx

现在完成时态
1.       用法：①过去发生的动作对现在造成的影响或结果：强调结果
例：Yesterday I finished my homework, that’s to say, I have finished my homework now.
②过去已经开始一直持续到现在的动作或状态：强调继续
例：I have lived here since 1990.
2.       现在完成时的构成 have\has+过去分词
3.       现在完成时的四个基本句型
肯定句 He has finished the work. 一般疑问句 Has he finished the work?
否定句 He has not finished the work. 两回答 Yes ,he has. No, he hasn’t.
特殊疑问句 What has he done?
4.       在下列情形下用现在完成时
1九词语
①already 已经 肯定句中或句尾 例: I have already found my pen. = I have found my pen already.
②yet已经 否定句和疑问句句尾 例：I have not finished the work yet.
Have you bought a computer yet?
③ever曾经 句中 例：Have you ever seen pandas?
④never从不 句中 例：I have never been to Beijing.
⑤just刚刚 句中 例：I have just done my work.
⑥before以前 句尾 例：I have never been there before.
⑦so far到目前为止 例：So far he has learnt 200 words.
⑧how long多久 例：How long have you lived here?
⑨how many times多少次 例：How many times has he been to Beijing?
2两词组
have<has>gone to去了某地 例：He has gone to Beijing (去了北京)
have<has>been to去过某地 例：He has been to Beijing. (去过北京)
3两结构
for two months
for +一段时间
Jim has lived here for 2 months.
since last year
since +过去点时间
Lucy has been in Beijing since 3 years ago.
since 3 years ago
since 1990
since he came here
since +过去时态句子
He has been in China since he came here.
4如果句子里面没有时间状语，汉语意思能够加“已经”