2015-2016学年人教版Book3 Unit4 Grammar
2015-2016学年人教版Book3 Unit4 Grammar第3页

4. To find your way can be a problem.

What does the underlined part serve as in each sentence?

3. Smoking is bad for you.

2. You are a student.

5. “How do you do?” is a greeting.

6. It is certain that we shall be late.

subject

1. Beijing is our capital.