there be句型的主語(yǔ)謂語(yǔ)是什么
2022-03-17 17:27:08文/丁雪竹there be句型的主語(yǔ)是there be后面的名詞,謂語(yǔ)是be。there be后面的名詞是句子的主語(yǔ),屬倒裝結(jié)構(gòu)。疑問(wèn)句形式是將be或will/have/can/must等助動(dòng)詞、情態(tài)動(dòng)詞提至there之前,否定形式則直接在be或助動(dòng)詞、情態(tài)動(dòng)詞后加not。

there be的用法
1.當(dāng)動(dòng)詞be后所接的名詞是單數(shù)可數(shù)名詞或不可數(shù)名詞時(shí),be 應(yīng)該取單數(shù)is;當(dāng)其后所接的名詞是復(fù)數(shù)的可數(shù)名詞時(shí),be用復(fù)數(shù)are。
2.如果There be 后面是幾個(gè)并列名詞做補(bǔ)語(yǔ)時(shí),動(dòng)詞be的形式和最靠近它的那個(gè)名詞保持?jǐn)?shù)的一致。
3.There be 句型中動(dòng)詞be可以有一般現(xiàn)在時(shí)、一般過(guò)去時(shí)、將來(lái)時(shí)和完成時(shí)。
4.There be 句型可以和各種助動(dòng)詞、情態(tài)動(dòng)詞連用。
5.There be 句型也可以和這樣一些的謂語(yǔ)動(dòng)詞連用:be going to 、seem to 、appear to 、used to、be likely to 、happen to …。
6.There be 結(jié)構(gòu)中除可以用be 外,還可以用其它動(dòng)詞。
7.There be 句型的否定句構(gòu)成方式是將否定副詞not放在be 之后。
8.There be 句型的一般疑問(wèn)句是將be 放在主語(yǔ)there 之前,回答時(shí)用yes或no,后接簡(jiǎn)單答語(yǔ)。
there be的句型使用
There was an increase in the percentage of aging population in Japan, Sweden and the USA.
解析:通常 in +時(shí)間(如in 1940)/地點(diǎn)(國(guó)家、城市等);當(dāng)然,在沒(méi)有給出描述對(duì)象的句子中,可以用in引出描述對(duì)象
There was a general upward trend in the number of elderly people in all three countries over the period from 1940 to 2020.
There was a slight rise from 8% in 1940 to 10% in 1960 in the percentage of elderly people in the USA.
解析:from …to固定搭配,常常結(jié)對(duì)出現(xiàn),表示“從…到…”,體現(xiàn)動(dòng)態(tài)變化;但若上文說(shuō)過(guò)起點(diǎn)數(shù)據(jù),則直接寫to+終點(diǎn)數(shù)據(jù)即可,表示“達(dá)到某個(gè)值”。
There was a sharp increase of /by 5% in the percentage of elderly people in 1980 in the USA.
解析:of +數(shù)據(jù),表示變化的差值;by+數(shù)據(jù),同樣也表示變化的凈增量或凈減量,用來(lái)體現(xiàn)動(dòng)態(tài)變化。
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