1.find+that引导的宾语从句
He found that no one could answer his question.
他发现没有人能回答他的问题。
I found that the job was very interesting.
我发现这份工作很有趣。
find意为“发现,发觉”时,其后可接多种形式的复合结构,即find+宾语+宾语补足语,宾语+宾语补足语即复合结构,宾补的形式有多种。

1)find+宾语+名词
We have found him (to be) a good boy.
我们发现他是一个好男孩。
2)find+宾语+形容词
He found the room dirty.他发现这个房间很脏。
3)+形容词+(for sb) to do sth
I find it difficult to get there on time.
我发现按时到那儿很难。
2. percent 名词,意为“百分之…”,常用于“基数词+percent”结构。percent没有复数形式,通常与具体数字连用,后面常与介词of搭配。
thirty percent 百分之三十
percent of后接名词作主语时,根据它所修饰名词的单复数来判断谓语动词的单复数形式。
Seventy percent of the boys like playing computer games.
70%的男孩喜欢玩电脑游戏。
Twenty percent of the water is covered with ice.
百分之二十的水被冰覆盖。