1 May is as pretty as brave.其中as...as能不能换成 both...and?
2 所有不及物动词都没有被动语态吗?
3 I was sent a novel on my birthday.为什么不是I was sent to a novel on my birthday。?不是说改为被动语态时动词词组中的介词不能省略吗?
4 Be careful when crossing the street.为什么cross用ing形式?
5 look forward to do sth.还是 look forward to doing sth.?
请各位解释清楚一些,谢谢~~