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Form Positive statement: I play, He plays Negative statement: I do not play (I don't play), He does not play (He doesn't play) Question form: Do you play? Does he play? Negative question: Do you not play? (Don't you play?) Does he not play? (Doesn't he play?) The passive voice: The game is played. The letters are written. (See more at Active and passive voice.) Spelling We only use - s ending (plays) in the third person singular. We add - es to the verbs that end in ss, sh, ch, x and o: misses, finishes, watches, mixes, goes. If the verb ends in a consonant and - y, we change - y into - i and use the - es ending: carry - carries, try - tries. But: play - plays, because this verb ends with a vowel and - y. The auxiliary verb do is not used to make questions and negative statements with modal verbs and the verb to be. Are you a student? Is he in London? I am not at home. He is not happy. Can you sing? Must I come? I cannot swim. He mustn't stay. If the wh- pronoun introducing the question (who, which) is the subject of the question, we do not use the auxiliary verb do. Compare the following sentences. Who knows you? ( who is the subject) Which cars belong to you? ( which cars is the subject) But: Who do you know? ( who is the object) The negative question normally expresses a surprise. Doesn't he work? Use