求英语同义词,如while=when=as

求英语同义词,如while=when=as when和while是不是同义词? 英语：around=?(同义词）如题 a little while 的同义词 while 同义词 after a while=? 求：she has got a sister 同义词是什么如题 求a huge amount of同义词如题. turn off 的同义词是什么...如：please turn off the lights when you leave the room.= please ____ ____ the lights when you leave the room.类似的还有turn on的同义词. once in a while同义词 Aoften Bnever Csometimes Dever a=10 while a 英语同义词转换be ill=( ) 英语when,while,since,for的用法? a few的同义词a few=( ) ( ) ( ) for a while 和 after a while的同义词分别是什么 what was he doing ______ you saw him last night如题.a.while b.when c.before d.after 是用when么?怎么不是while 关于when,as,while的一道英语题目The students are playing basketball__ it began to rain.A.as B.while C.when 请给出解释. 求when,while,as用法的区别!