If I ()(know) how to sing the song,I have enjoyed you that day

I know how to cook I know how to give If I ()(know) how to sing the song,I have enjoyed you that day If I can't find it,how can I know where to go?为什么要用how How can I know if a girl wants to dance with want to know,if this is not love,how should I do,can you tell me?” How can I know if a girl wants to dance with “It would is great if i know how to give you if i don't know how to swim条件状语从句,后面怎么写? if i don't know how to swim------------.条件状语从句.后面填什么? how will i know if I let you go意思? If I (had know) how to sing the song,I would have joined you that day.为什么不是knew I want to know how you I don't know how to i don't know how to I know how to ask problem wish I know how to quit you. I know just how to fake