宾语从句复合句！！！

.What's his name?I asked him.(改为宾语从句复合句)
I asked him what____is_______ __his_________ _____name______.

2.Why didn't he look happy?Could you tell me?(同上)
Could you tell me why __he________ __didn't________look happy?

3.Does he still live in that street?I don't know.
I don't know___if________he still _____live_____in that street.

4.Whose children is the old woman looking after?Did you find out?
Did you find out whose children the old woman_____looking_____ ________after?

1\his name is
2\he didn't
3\if live
4\is looking