be allowed 后跟什么 to doing ,doing ,do
问题描述：
be allowed 后跟什么 to doing ,doing ,do
答
somebody（某人） should be allowed to do something（某事）某人应该被允许做某事
没有should be to do的用法。
例如：The task should be to complete the project by the end of this month.
主语是:the task should be.....
to complete the project整体作为宾语...
答
to do
答
be allowed to do sth