be present at出席，到场

注意：present可作形容词，作"在场的，出席的"讲时，放在被修饰词的后面；作"现在的，目前的"讲时，放在被修饰词的前面。

[语境助记]

(1)His black­and­white pictures present a world almost lost in time.(2016·四川)

他的黑白照片展示了一个几乎被时间遗忘的世界。

(2)Guest speakers will also present prizes to the students.

应邀发言者也将为学生们颁奖。

(3)We do not have any more information at the present time/at present/now.

目前我们没有进一步的消息。

[题组训练]

(1)用适当的介词填空

①Who will be present the concert?

②The mayor presented him a gold medal at an official city reception.

③The students presented flowers their teacher.

(2)翻译句子

At present，the girl present at the party is considering asking her father for the prize that just has been presented to him as a birthday present.

经典句式

1．...often it's quite difficult to find who's responsible for pollution.

......通常很难发现谁该为污染负责。

[归纳拓展]

(1)在此结构中，it为形式主语，动词不定式是真正的主语，其基本结构为：It be＋adj./n.＋(for/of sb.) to do sth.。

(2)在"It be＋adj.＋for sb.to do sth."句型中，形容词说明不定式所表示的行为的性质和特点。能用于该结构的形容词有difficult，easy，hard，important，impossible，necessary，possible等。

(3)在"It be＋adj.＋of sb.to do sth."句型中，形容词说明不定式的逻辑主语的品行、性格、