Don't you remember seeing the man before?     你不记得以前见过那个人吗?It's for sb.和 It's of sb.

1.for sb. 常用于表示事物的特征特点，表示客观形式的形容词，如easy, hard, difficult, interesting, impossible等：

It's very hard for him to study two languages. 对他来说学两门外语是很难的。

2.of sb 的句型一般用表示人物的性格，品德，表示主观感情或态度的形容词，如good, kind, nice, clever, foolish, right。

It's very nice of you to help me. 你来帮助我，你真是太好了。

for 与of 的辨别方法：

用介词后面的代词作主语，用介词前边的形容词作表语，造个句子。如果道理上通顺用of，不通则用for。如：

You are nice. (通顺，所以应用of)。

He is hard. (人是困难的，不通，因此应用for。)

9) 对两个句子的提问

新目标英语在命题中有将对句子划线提问这一题型取消的趋势，现在采取的作法是对一个句子进行自由提问。例如：

句子：The boy in blue has three pens.

提问：1.Who has three pens?

2.Which boy has three pens?

3.What does the boy in blue have?

4.How many pens does the boy in blue have?

很显然，学生多了更多的回答角度，也体现了考试的灵活性。再如：

句子：He usually goes to the park with his friends at 8:00 on Sunday.

提问：1.Who usually goes to the park with his friends at 8:00 on Sunday?

2.Where does he usually go with his friends at 8:00 on Sunday?

3.What does he usually do with his friends at 8:00 on Sunday?

4.With whom does he usually go to the park at 8:00 on Sunday?

5.What time does he usually go to the park with his friends on Sunday?

6.When does he usually go to the park with his friends?