表继续:说明动作从过去一直延续到现在。
1、过去时:I began to work three years ago.
2、现在时:I still work now.文章源自微观生活(93wg.com)微观生活-https://93wg.com/9149.html
1+2=3 现在完成时:I have worked since three years ago.文章源自微观生活(93wg.com)微观生活-https://93wg.com/9149.html
现在完成时说的是过去产生的事,但必需以及现在有关,否则就用过去时。文章源自微观生活(93wg.com)微观生活-https://93wg.com/9149.html
注意:文章源自微观生活(93wg.com)微观生活-https://93wg.com/9149.html
1、可从时间状语判断句子是不是合用完成时:文章源自微观生活(93wg.com)微观生活-https://93wg.com/9149.html
She always play alone in the park for one hour every day.文章源自微观生活(93wg.com)微观生活-https://93wg.com/9149.html
这句话是一般现在时,由于它指的是一个客观情况,每一天都独自公园玩一小时,时间状语every day也限定了时态为现在时。文章源自微观生活(93wg.com)微观生活-https://93wg.com/9149.html
2、通常,since引导的从句用过去时,主句是现在完成时,但“It\'s+时间····”开始的句子例外。文章源自微观生活(93wg.com)微观生活-https://93wg.com/9149.html
It\'s ten years since he gave his girlfriend a red rose.文章源自微观生活(93wg.com)微观生活-https://93wg.com/9149.html
表经验:动作产生在过去,但现在还有印象。
1、He was playing alone in the park.文章源自微观生活(93wg.com)微观生活-https://93wg.com/9149.html
2、 Now he remembers the park.
1+2=3 现在完成时:He has played alone in the park.
他曾经独自在这个公园玩过。用现在完成时就表示过去的这个阅历以及现在有关,即暗指他现在还记的这个公园,或这个公园对他印象很深,所以3=1+2如果只用1就表示一个客观事实,与现在无关。
时间状语:
置于句中:often,ever,never,固定位,放在助动词have/has后,过去分词前。
We have often played in the park.
置于句末:表频率的副词 once,several times等
I have played alone in the park once.
置于句首:对时间发问的疑难词
How many times have you been to the park?
have/has been 用法:
have been to
I have been to America twice.
我曾经去过美国两次。
I have been to the great wall.(完成)
我去长城了。
have been in
Have u ever been in London?
比较:I filled in the registratiom form yesterday.
They\'ve gone to Sichuan.
“结果”的意思是“做了···(现在是其结果)”。表示过去动作的结果对现在仍有影响,包括两个含意。
1、He invented TV.
以上就是微观生活(93wg.com)关于“英语语法讲授2:现在完成时的用法”的详细内容,希望对大家有所帮助!
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