英语1.thesandwichiatemuctbeoutofdate.beoutof
2.afteritisfinished,youcaninviteyourfamilymemberstotasteit,请问isfinished是被动句吗?is为什么不是was?
3.don'tspendthewholeaternoondoiongsportsoutside,andidothinkyoushouldpracticechessafteranap,请问idothink中的do不能去掉吗?没见过这么用的
4.whydoyouwriteonbothsidesofthepaper?thepaperlookssodirty()paper,mother.AsaveBtosave请问此题答案为什么不是A祁使句动词原形开头,和不定式开头以及动名词开头都有哪些用法区别期待你的解答