动词作主语要变成动名词,或是动词不定式.什么时候可以和动词不定式互换,什么时候不能换?就是V+ing,to do 作主语时可以互换么?在句首.要详细点的,最好举例说明.哪些能换,哪些不能换.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 16:54:13
![动词作主语要变成动名词,或是动词不定式.什么时候可以和动词不定式互换,什么时候不能换?就是V+ing,to do 作主语时可以互换么?在句首.要详细点的,最好举例说明.哪些能换,哪些不能换.](/uploads/image/z/11632832-8-2.jpg?t=%E5%8A%A8%E8%AF%8D%E4%BD%9C%E4%B8%BB%E8%AF%AD%E8%A6%81%E5%8F%98%E6%88%90%E5%8A%A8%E5%90%8D%E8%AF%8D%2C%E6%88%96%E6%98%AF%E5%8A%A8%E8%AF%8D%E4%B8%8D%E5%AE%9A%E5%BC%8F.%E4%BB%80%E4%B9%88%E6%97%B6%E5%80%99%E5%8F%AF%E4%BB%A5%E5%92%8C%E5%8A%A8%E8%AF%8D%E4%B8%8D%E5%AE%9A%E5%BC%8F%E4%BA%92%E6%8D%A2%2C%E4%BB%80%E4%B9%88%E6%97%B6%E5%80%99%E4%B8%8D%E8%83%BD%E6%8D%A2%3F%E5%B0%B1%E6%98%AFV%2Bing%2Cto+do+%E4%BD%9C%E4%B8%BB%E8%AF%AD%E6%97%B6%E5%8F%AF%E4%BB%A5%E4%BA%92%E6%8D%A2%E4%B9%88%3F%E5%9C%A8%E5%8F%A5%E9%A6%96.%E8%A6%81%E8%AF%A6%E7%BB%86%E7%82%B9%E7%9A%84%2C%E6%9C%80%E5%A5%BD%E4%B8%BE%E4%BE%8B%E8%AF%B4%E6%98%8E.%E5%93%AA%E4%BA%9B%E8%83%BD%E6%8D%A2%2C%E5%93%AA%E4%BA%9B%E4%B8%8D%E8%83%BD%E6%8D%A2.)
动词作主语要变成动名词,或是动词不定式.什么时候可以和动词不定式互换,什么时候不能换?就是V+ing,to do 作主语时可以互换么?在句首.要详细点的,最好举例说明.哪些能换,哪些不能换.
动词作主语要变成动名词,或是动词不定式.什么时候可以和动词不定式互换,什么时候不能换?
就是V+ing,to do 作主语时可以互换么?在句首.要详细点的,最好举例说明.哪些能换,哪些不能换.
动词作主语要变成动名词,或是动词不定式.什么时候可以和动词不定式互换,什么时候不能换?就是V+ing,to do 作主语时可以互换么?在句首.要详细点的,最好举例说明.哪些能换,哪些不能换.
相同点:
1.不定式短语和动名词做主语时,常常为了保持句子的平衡,用it来做形式主语,如:
It is not easy to learn English well.It is no use asking him for help.
2.如果主语用了不定式,表语和宾语也要用不定式;主语用了动名词,表语和宾语也要用动名词,这在英语中称为对称性,如:
To see is to believe.= Seeing is believing.(眼见为实)
It is better to stay home than to go out.
不同点
1.不定式做主语常表示具体的某一动作;表示泛指或一般的抽象的概念时,多用动名词,如:
Walking is a good form of exercise for both young and old.
2.在”There/It +be+ no use(good/help/need)”之后常用动名词做主语,而少用不定式,如:
It/There is no use crying over the split milk.
It/There is no help taking this medicine.
★注意:如果该句型中用了for引出不定式的逻辑主语,就只能用不定式,如:
There is no good for us to do that exercise.
3.不定式可以和when,where,how,what,whether等连用,在句子中做主语,宾语和表语,
而动名词则不能,如:
How to solve the problem is a hot potato.
Where to put the box seems hard to decide.
Whether to do it hasn’t been decided.
What to do next is up to you.
4、不定式作主语通常表示一次性、未来的且具体的特指动作.
而动名词作主语通常表示习惯性、经常性和不具体的泛指动作.
5、动名词作主语和不定式作主语有时可以互换,
例如:It is dangerous playing (to play) with fire.
Seeing is believing./ To see is to believe.
但这种情况不具有规律性
都可以换
to do有时 暗含有“一次性或将来”的意思
V+ing 有时暗含有“长期的,习惯的”意思