2016-2017学年 人教版 必修三 Unit 4 Astronomy :the science of the stars grammar课件 (18张)
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Grammar

3. To find your way can be a problem.

2. Smoking is bad for you.

1. You are a student. zx xk

4. “How do you do?” is a greeting.

5 .What she said is not yet known.

6. That we shall be late is certain.

7. It is certain that we shall be late.

Subject(主语)

A sentence serving as subject is called Subject Clause.