Must and have (got) to

Both must and have got to can be used to talk about necessity. They are usually interchangeable; however, have got to is mainly used to… Continue reading

Can and be able to

Both can and be able to can be used to talk about ability and permission. In some cases, both structures are possible. However, in some… Continue reading

Using have

The verb have has three forms: has, have and had. The forms has and have are used in the present tense. Had is used in… Continue reading