Tài liệu Oxford Guide to English doc

... or a to- infinitive.I had to hurry to get here. We asked to be allowed to go.Modal verbs express meanings such as necessity and possibility. We can usemodal verbs to tell or allow people to do ... we use be going to or thepresent continuous, but not will.We're going to eat out tonight. (We have decided to eat out.)We're eating out tonight. (We have arranged to eat out.)We ... I will be able to )There might be a storm. (= There will possibly )We must post the invitations soon. (= We will have to )NOTEWe can use be sure to/ be bound to + base form to express certainty...