英语入门对话:51 Expressions for Description

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Sentences:
        It is . . .
        This is something . . .
        It's something that you . . .
        You can (verb) it.
        You can (verb) with it.
        You can use it to (verb).
        It is used for V + ing.
        You need it for V + ing.
        You need/use it when . . .
        If you want/need to (verb), then you can . . .
       
Questions:
        Is it . . . ?
        What do you do with it?
        What is it made of?
        What is it used for?
        What's the difference between A and B?