答案解析

查看更多优质解析解答一举报现在完成时是英语时态中最不好掌握的时态,

因为对我们来说,

它很难在汉语中找到相对应的说法,

下面笔者从几个方面分析一下现在完成时的用法.

1． 现在完成时的定义：2． 强调过去的动作和状态对现在产生的影响和结果.

常用的时间状语有：already,

yet,

never,

有时没有时间状语；多是一般疑问句.

I have already seen the film.

Have you decided yet?3． 刚刚和最近发生的动作和状态.

常用的时间状语有：just,

lately,

recently,

in the past few days/weeks注意：just 和just now用不同的时态,

just now(刚才)一般用过去时.

I have just phoned him?I have visited my parents recently.

4． 从过去一直延续到现在的动作和状态.

常用的时间状语有：since,

（可用作介词和连词）for 注意：主句的谓语动词一般是延续性的动词,

如果是否定形式,

主句的谓语动词可用瞬间动词,

否则,

不能用瞬间动词.

I have lived here for 20 years.

I have lived here since I came to this cityI have learned English since 10 years ago.

He hasn\'t come to visit us for a few months.

5． 从过去到现在一段时间的动作和状态.

常用的时间状语有：up till now,

so far,

in this morning,

in this week,

in this year,

in my life注意：这两句话的区别I have seen him this morning.

(时间还在上午)I saw him this morning.

(时间不是在上午了)We have learned so many things from you so far.

I have seen any bird like this in my life.

6． 对过去的体验和经历.

常用的时间状语有：before,

ever,

once,

twice,

many times注意：这两句话的区别I have been to Beijing （去过北京）I have gone to Beijing（去北京了,

人还没回来〕

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