Affirmative answers have the following structure: Yes, subject + auxiliary verb. Read the following sentences. Has he given his consent? Yes, he has. In short… Continue reading

The basic principle of subject-verb agreement is simple. If the subject is singular, it should be followed by a singular verb. If the subject is… Continue reading

Negative replies have the following structure: No, subject + auxiliary verb + not Read the following sentences. Have they lodged a complaint? No, they haven’t… Continue reading

The structure should / must / ought to have + past participle is used to say what one thinks was essential. You should have locked… Continue reading

An intransitive verb does not have an object. However, it manages to express a complete thought without the help of other words. Look at the… Continue reading