1，现在完成时练习He has never go to the science museum答案

have been to 是曾经去过，现在人不在那里了have gone to 是人现在还在那里，还没回来此句，显然是他人现在不在科学博物馆，所以用has been to

现在完成时练习He has never go to the science museum答案

2，关于现在完成时求一道例题答案解析

解释如下：he claims to （have） seen a snowman in the mountain.他声称在山上看见了一个雪人。括号里的has要改为have。可以理解为to 这里是动词不定式，后面接动词原形。故采用have.
正是因为没有具体的时间，表示已经发生的动作对现在的影响，用现在完成时。Jack has forgotten to call his mother.忘记给他妈妈打电话。再如：I have seen the film.电影我看过，知道它的内容和好看不好看。如果用过去时，加个具体的过去时间：Jack forgot to call his mother yesterday.I saw the film yesterday,只是强调是昨天看的。其它情况无所谓。

关于现在完成时求一道例题答案解析

3，初二英语现在完成时练习题

1.polluted (the poison in the waste是句子主语，这个句子是缺谓语，应该填动词.其实没有上下文的话用pollutes是可以的，但如果有上下文的话就要看时态了) 2.were(there be句型是采用就进原则，后面的people在这里是“人”的总称，应是person的复数形式，所以用were) 3.did,move to（从这个中文翻译来看应该是用过去时，move to 是固定搭配） 4.In the past, few people knew me.(“过去”一般可用in the past来表示，当然，把before放在句末也可做同意，“很少”在这里不用译为not many，这样会显得很Chinglish，直接用few就行了) 5.I lived together with my parents till 1990.(如果用until的话需换成过去完成时：I had lived with my parents until 1990.) 6.This place has been changed into an airport.(注意要用完成时时不要用短暂性动词，例如die，一个人总不能一直在死吧？） 7.joined,since（注意joint是一个adj,表示结合联合，而不是join的过去式） 8.How long（这个是叫你对时间的长短进行提问，所以用how long）
pollutionwasdid move toin the past, few people knew me.my parents and i had lived together until 1990it has been changed into an airport here.joined..sincehow long
1.pollutes 2.was 3.did, move, to 4. not many people knowed me in the pass 5. i lived with my parents before 1990. 6.this place has become a airport. / this place has been rebuilt as an airport. 7. been/ joined , since 8. how long
1 pollutes 2 was 3 did move to (动作已经完成，所以用did） 4 There was few people knowing me in the past. 5 My parent lived with me until 1990. 6 This place is turned into airfield. 7 been since 8 How long
1. pollutes, polluted 都对2. was3. when did you move to Nanjing4. very few people know me in the past5. I had been staying with my parents till 19906. this place has become an airport7. he has been/joined/enlisted in the army since 5 year ago8. since when/ how long has Mr wang taught English in this school？
7题第一空 join in 不可延续 最好用been

初二英语现在完成时练习题


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