英语：unit4helping people around the world-grammar and usage教案（牛津译林版选修6）

● Grammar and Usage

Step 1: General introduction

This section teaches four other cases that need to use unreal conditionals. You’ll learn the forms of mixed unreal conditionals, words that can replace if-clauses in implied conditionals and the usage of wish or would rather in unreal conditionals.

Step 2: Revision

As we learned in the last unit, when a sentence is talking about something that is not real or currently impossible, the verb will be used in a special form that expresses a wish, possibility, condition, etc.

Here’re some exercises for you. Choose the best answers:

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