allow的多种用法

　　一、allow作“允许”或“许可”讲,常搭用动词不定式短语作宾语补足语即,allow sb.to do sth.允许某人做某事

　　We were allowed to smoke in this room only.

　　我们只许在这间屋子里抽烟.

　　Please allow me to carry your bag.

　　请让我替你拿包.

　　My boss doesn't allow me to use the telephone.

　　我的老板不允许我用电话.

　　二、allow 作“许可”,“允许”讲,只可搭配动名词短语作宾语,不可直接搭用动词不定式作宾补,即只可说 allow doing sth.,不可说allow to do sth.

　　Smoking is not allowed here.

　　此处禁止吸烟.

　　They allowed smoking in this room only.

　　他们只允许在这间屋子里抽烟.

　　三、allow还常与 out,in,up等副词搭配使用,即 allow sb.in/out/up等.

　　She won't allow the children in until they've wiped their shoes.

　　直到孩子们把鞋擦干净,她才让他们进来.

　　She is not allowed out after dark.

　　天黑后,不准她出去.

　　The patient was allowed up after ten days.

　　十天后病人才被允许起床(下地).

　　【注意】下面的独立主格结构,表示条件

　　Circumstances allowing,we shall further improve out farming method.(即 If circumstances allow,we shall further improve our farming method.)如果情况许可的话,我们将进一步改进工作方法.