I think he can do it himself.否定句

I think he can do it himself.否定句 he think do i can it I think I can mend it.改为否定句 I think he has smoething to do.(改为否定句) I think .He can't drss himself.（合成一句）急用! I belive i can do it否定句 I think it's boring的否定句 He thinks it's boring的否定句 He ________ can do it well.Believe him (he) .himself i think he can speak English的否定句为什么是I don't think he can spe I don't think i can do it ,______?与 I thing he do it_____? i don't think he can do it well at three years old,but he do 像I think he can do it ,can't he?这样的含think 的反义疑问句,要40个