句子的種類 1．英語中按使用目的或功用分為四類：陳述句、疑問句、祈使句、感嘆句。 A．陳述句。 ○1 陳述句說明一個(gè)事實(shí)或陳述一個(gè)人的看法。陳述句分為肯定陳述句和否定陳述句兩種。 a．陳述句的肯定式。I have already posted the photos. / They are students. / I must go now . / He was reading a book at 8:00 last night. b．陳述句的否定形式。 （1）謂語動(dòng)詞是系動(dòng)詞be, 助動(dòng)詞have, will, shall, be或情態(tài)動(dòng)詞，只須在其后面加not構(gòu)成否定句。 She isn't a student . / He hasn't been to the Great Wall . / I can not swim . / You will not go there tomorrow. / They aren't sleeping . （2）若謂語動(dòng)詞是實(shí)義動(dòng)詞，在實(shí)義動(dòng)詞前加上do not，第三人稱單數(shù)現(xiàn)在時(shí)用does not，過去時(shí)用did not。 He didn't send me an invitation . （3）由具有否定含義的詞never, nobody, hardly, little, dislike, seldom, few, too
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