These shoes need()at once为什么只能填mending不能mend 即二者区别?

These shoes need()at once为什么只能填mending不能mend 即二者区别? 同义句 Her leather shoes need mending These chairs need mending,___ they? I need time __my computer a.to mend b.mending c.mend d.mende How long will you___to stay in bed?为什么只能填have,不能填need all at once ; at once 的区别.15填什么? I need ____my bicycle A:mended B:mending C:to mend at once 为什么不能作连词 need情态动词 应该加原形 为什么是need mending It needs mending和It needs to mend.到底什么区别,平时习惯用哪种表达 the TV set needs ( ) 为什么用 mending 而不用 to mend 是被动语态吗 these jobs wanted () at once