一年级英语现在完成时知识点总结

一年级英语现在完成时知识点归纳（一）
用于现在完成时的句型
1)It is the first / second time.... that…结构中的从句部分，用现在完成时。例如：
It is the first time that I have visited the city. 这是我*一次访问这城市。
This is the first time (that) I've heard him sing. 这是我*一次听他唱歌。
注意：It was the third time that the boy had been late.
2)This is +形容词较*+that…结构，that 从句要用现在完成时。例如：
This is the best film that I've (ever) seen. 这是我看过的较好的电影。
典型例题
(1) ---Do you know our town at all? ---No, this is the first time I ___ here.
A. was B. have been C. came D. am coming
答案B. This is the first time 后面所加从句应为现在完成时，故选B。
(2) ---Have you ____ been to our town before? ---No, it's the first time I ___ here.
A. even, come B. even, have come C. ever, come D. ever, have come
答案D. ever意为曾经或无论何时，反意词为never，此两词常用于完成时。
注意：非延续性动词的否定形式可以与表示延续时间的状语连用。即动作不发生的状态是可以持续的。
(错)I have received his letter for a month.
(对)I haven't received his letter for almost a month.一年级英语现在完成时知识点归纳（二）

一般过去时现在完成时主要用于：
1 、表示到现在为止这一时期中发生的动作或情况，即多次动作的总和。
e.g. We have learnt four English songs this month.
How many times have you read the novel?
For many days we haven`t seen each other.
2 、表示对现在有影响的某一已发生的动作。
e.g. The delegation has left 代表团已经走了(说明现在不在这里)
Look, what you have done. 看你干的事。
与这一时态连用的时间状语有：
already, yet, just, ever, never, by now, so far, recently, by the end of this month, since, for 短语，连词 since 引导的时间状语从句。
一般过去时与现在完成时的区别：
一般过去时：重在说明动作在过去发生时的具体情况(时间、地点、方式、对象、细节等)。
现在完成时：只提起已发生的动作(事实)及其影响，不说明动作发生时的具体情况。
cf. Have you had your lunch?
What did you have for lunch?
I have ever been to the Great Wall,_and_I went there last summer with my father.
注：现在完成时表达的动作常具有反复性，故下面一句是错的：
Have you seen the six thirty`s news program?
应改为：
Did you see the six thirty`s news program?
一般过去时现在完成时主要用于：
1 、表示到现在为止这一时期中发生的动作或情况，即多次动作的总和。
e.g. We have learnt four English songs this month.
How many times have you read the novel?
For many days we haven`t seen each other.
2 、表示对现在有影响的某一已发生的动作。
e.g. The delegation has left 代表团已经走了(说明现在不在这里)
Look, what you have done. 看你干的事。
与这一时态连用的时间状语有：
already, yet, just, ever, never, by now, so far, recently, by the end of this month, since, for 短语，连词 since 引导的时间状语从句。
一般过去时与现在完成时的区别：
一般过去时：重在说明动作在过去发生时的具体情况(时间、地点、方式、对象、细节等)。
现在完成时：只提起已发生的动作(事实)及其影响，不说明动作发生时的具体情况。
cf. Have you had your lunch?
What did you have for lunch?
I have ever been to the Great Wall,_and_I went there last summer with my father.
注：现在完成时表达的动作常具有反复性，故下面一句是错的：
Have you seen the six thirty`s news program?
应改为：
Did you see the six thirty`s news program?