I like to play guitar,为什么要用to

I like to play guitar,为什么要用to I WOULD LIKE——PLAY THE GUITAR 空格内要不要加TO 你能把I want_____the guitar为什么要填to play的原因说一下吗? I like to watch them play为什么不是to play she can play the piano but i'd like to learn -- guitar我想问下le What's your h——?I like to play the guitar . she learns to play the guitar every week 为什么用to play learn to play the guitar还是learn playing the guitar? Sow us how to play the guitar she want to play the guitar否定 英语连词成句：the i to learn want play guitar to I like ( ) with my pink ball.A.play B.to play c.played 为什么?