2018-2019学年北师大版高二选修七教案:Unit 21 period 2
2018-2019学年北师大版高二选修七教案:Unit 21 period 2第3页

1. It's imaginary, unreal and contrary to the facts.

2. It describes a situation that is imaginary, unreal and contrary to the facts..

3. It describes a situation that is contrary to the facts and unreal.

4. It is imaginary, unreal and contrary to the facts.

T: Look at these four sentences, what time does each condition (underlined) in the sentence refer to: past, present or future? What tense is used? Let's complete the table below.

Condition Time reference Verb form 1 the present past simple 2 the present past simple 3 the past had + past participle 4 the past had + past participle T: What time does the result in the sentences refer to: past or present? What verb form is used?

Result Time reference Verb form 1 the past would + perfect infinitive 2 the past would + perfect infinitive 3 the present would + verb 4 the present would + verb Task 3 Explanation

T: This is a structure used to talk about unreal, imaginary or contrary to the facts situations in the present, in the future or in the past. Please pay attention to the verb forms of each clause and main sentence and then I will explain how it is formed, and when we use it.

Students are expected to master these and to apply what they have learned to their future study.

The teacher can use the following diagram to help students to understand the conditionals.