问题描述：
下列动词不定式在句中做什么成分
1.His task is to learn about Beijing Opera while he is in China
2.It is important to take good care of ourselves
3.The policeman warns the children not to play on the street.
4.I won't let you to watch TV so long because you have so much homework to do
5.Tom will come to China to visit friends.
注意第四句有两个 to watch to do
还有能告诉我分别的方法吗？
1.His task is to learn about Beijing Opera while he is in China
2.It is important to take good care of ourselves
3.The policeman warns the children not to play on the street.
4.I won't let you to watch TV so long because you have so much homework to do
5.Tom will come to China to visit friends.
注意第四句有两个 to watch to do
还有能告诉我分别的方法吗？
问题解答：
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