allow doing. sth. 允许做某事。如:
We don’t allow eating in the classrooms. (我们)不允许在教室吃饭。
注:有时用于被动语态。如:
Smoking is not allowed here. 此处不准吸烟。
allow sb. to do sth. 允许某人做某事。如:
My parents don’t allow me to go out at night. 我父母不允许我晚上出去。
Her boss doesn’t allow her to use the telephone. 她的老板不允许她使用电话。
注:有时用于被动语态。如:
Passengers are not allowed to smoke. 乘客不准吸烟。
从语态上来区别:to do只能当allow用在被动语态的时候才能用,也就是只能是这种形式:
sb be allowed to do sth
He was allowed to drink some wine.
而allow doing 这种用法allow只能用在主动语态中,即:
sb allow doing sth
They allow our taking photo here.
从意义上来分别:
to do 结构中do的发出者是句子的主语(he);
doing结构中do的发出者不是句子的主语,而是另有他人(we)。