allow 后接 to do 和 doing 有何区别?
问题描述：
allow 后接 to do 和 doing 有何区别?
答
allow上后面只能接doing的形式,还可以接不定式的复合结构,即 allow sb.to do sth.接 to do 的形式 只能是将allow 变为被动语态才可以,即 be allowed to do sth.
e.g.They do not allow smoking here.
Are we allowed to use the basin by the side of the cupboard?