1.Don't leave ,the baby wants _____(watch)

1.Don't leave ,the baby wants _____(watch)
为什么是填watching.而不是to be watched
2._____(learn)about English is one thing,_____ (know)English is
quite another .
为什么是填不定式,而不能填动名词?]
3.I won't have that sort of thing ______(happen)
为什么是填现在分词,而不填过去分词
4._______(leave)in charge of the hospital ,he did better than anyone ease.
为什么过去分词不是现在分词?
want /need/require/deserve这四个词后加doing 和 to be done不是都可以的嘛...都表示被动额丫....