Ⅱ.重點句型詳解

1．However, it is ikely that Native Americans were living in California at least fifteen thousand years ago.

然而，美洲土著人有可能在至少15 000年前就在加州生活著。

本句式中 it為形式主語，真正的主語為 that從句。

It is likely that... ……是可能的。此句型可轉(zhuǎn)化為：Sb./Sth. be likely to do... 某人/物可能干某事。

①She‘s very likely to ring me tonight.

＝It’s likely that she will ring me tonight.

她今晚很可能給我打電話。

②It‘s likely that it will snow tonight.

＝It is likely to snow tonight.

今天晚上可能下雪。

[即境活用1]　Ronaldo was ______ to win the 100－meter hurdle race, but he fell to the ground and missed the chance.

A．possible　　 B．probable ? ? ?C．likely ? ? ? ? D．maybe

答案：C

解析：當 possible或 probable 做表語時，主語只能是事物或代詞 it;而 likely 做表語時，主語可以是人，也可以是物。maybe 是副詞，只能做狀語，不能做表語。

2．It is believed that before long the mix of nationalities will be so great that there will be no distinct major racial or cultural groups, but simply a mixture of many races and cultures.

過不了多久國籍間相混的程度將如此大以至于不再有明顯的種族或文化團體，而僅僅是一個種族和文化的混合體。

本句用的句型是 It is believed that－ 是形式主語，真正的主語是后面的 that－clause.

類似的結(jié)構(gòu)還有：It be said/known/agreed/thought/supposed/reported＋that－clause.

此句型可轉(zhuǎn)化成：

(1)People say/know/agree/think/suppose/report＋that－clause.

(2)Sb./Sth. be said/known/agreed/thought/supposed/reported＋to do.

①It is believed that Mr Smith is innocent.＝Mr Smith is believed to be innocent.

人們認為史密斯先生是無辜的。

②It is believed that Professor Johnson has finished his second novel.＝Professor Johnson is believed to have finished his second novel.

人們相信約翰遜教授已完成了他的第二部小說。

[即境活用2]　The lake by the village is believed ______ a number of victims in the past 3 years.

A．to claim ? ? ? ? B．to have claimed ? ? ? ??C．claiming ? ? ? ? D．being claiming

答案：B

解析：句意為“人們相信村子旁邊的湖泊在過去的三年里已要了許多人的命”。在這種形式中，believe 后面不能跟 v．－ing形式；由 in the past 3 years 可知，事情是已發(fā)生的，因此，需用不定式的完成式與之相對應(yīng)。