already(已经),just(刚刚),never(从不),ever(曾经),yet(仍然)for+一段时间,since+过去年代/+过去时间/+一般过去时态的句子。例句:I have known him for years.我认识他已经好几年了。
现在完成进行时是英语中动词的一种基本时态,其构成为:主语+助动词(have/has)+been+动词的现在分词+其他成分。表示动作从某一时间开始,一直持续到现在,或者刚刚终止,或者可能仍然要继续下去。
基本句型:
肯定句:主语+have/has+been+动词的现在分词+其他
否定句:主语+haven’t/hasn‘t+been+动词的现在分词+其他
一般疑问句:have/has+主语+been+动词的现在分词+其他
肯定回答:Yes.主语+have/has
否定回答:No.主语+haven't/hasn't
All these years they have been contributing articles to our magazine.
这些年来,他们一直为我们杂志写稿.
She has been writing the letter since four o”clock in the afternoon.
从下午四点钟到现在,她一直在写信.
We have been studying in this school for three years.
我们一直在这所学校学习了三年.
How long have you been watching TV?
你看了多久电视了?
We have been seeing quite a lot of each other recently.
最近我们常常见面.