点击收藏!英语现在完成时16个标志词
标志词:just,ever,never,yet,already,for,before,since,so far,recently,twice,still,till now,up to now,three times等。
现在完成时标志词
already
用在肯定句中(be动词、助动词、情态动词之后,实意动词之前)常与yet进行转换。
例如:
I have already finished the work.
我已经完成这项工作了。
改为否定句:
I haven"t finished the work yet.
我还没有完成这项工作。
改为一般疑问句:
Have you finished the work yet?
你完成工作了吗?
yet
放在否定句和一般疑问句句末。
其他的标志词:just,before,recently,still,lately,never,ever,twice,on several occasions, in the past / last few days / weeks / months / years,(up to)these few days / weeks / months / years , this week / morning / month / year(多用于一般过去时),up to present,so far,up to now,up till now,till now。
since+时间点=for+时间段=since+时间段+ago
since+一般过去时态的时间状语从句。
例如:
He has been here since he joined the army.
自从他参军以来,他一直在这儿。
before
表示之前发生的事情,放在句末
例如:
I have been to this place before.
我之前去过了这个地方。
just
表示刚刚做过的事情,放在have/has后面
例句:
I have just cleaned my room.
我刚刚清理了我的房间。
ever
表示经常的或习惯性的动作,常与表示频率的时间状语连用。放在have/has后面,动词后面
例句:
Their debts have grown ever larger.
他们的债务不断增加。
现在完成时
肯定句:
He/she/it+has+过去分词
You/We/They+have+过去分词
否定句:
He/she/it+hasn"t+过去分词
You/We/They+haven"t+过去分词
疑问句:
Have/has+主语+过去分词
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