What I need is a bath and a good sleep请问前面为什么要加个what如果直接写I need is a bath and a good sleep可以吗?

What I need,just is a hug A simple happiness is just what I need. what i need is a book which can help What I do not need your return,I really need is a love my heart what i need is what they what we need is a It is just what I need． what I need just a song I have a lot of work to do this week,What I need is more time为什么这里用What Simple love is good,which is just what I need. It is a baseball bat.改复数 This is exactly what I need.为什么不说 This is that I need.这是什么句式 Hi,Jake,come here.I need your help.( )A.What is the time?B.What is up?C.I want your car.D.What would you like? I need love,yes i do but this is what i need from you Where is my baseball bat?Your father （） it.I watch him play baseball with your bat.A don't B has C doesn't have D have what if i need goodlooking is fine i got what you need 英文歌 I need what is our love but you.