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Carol: Excuse the mess, Sam. This room’s very untidy.We’re packing our suitcases.
We’re going to leave tomorrow.Tom and I are going to have a holiday.
Sam: Aren’t you lucky!
Tom: When are you going to have a holiday, Sam?
Sam: I don’t know.I’ve already had my holiday this year.
Carol: Where did you go?
Sam: I stayed at home.
1．Come in. 进来吧。
Have a cup of tea then.
Let's go into the living－room, Carol.
这3句都是祈使句。表示请求或命令的句子叫祈使句。祈使句中主语you常不出现，谓语动词用原形，句末用感叹号或句号。读时用降调。
2．I've just had a cup. 我刚喝了一杯。
句中 cup后省略了 of coffee。
3．We're going to leave tomorrow.
这里的 are going to表示“打算”、“准备”。
（3）现在完成时由 have／has+ 过去分词构成，单数第 3人称用has，其他人称皆用have。规则动词的过去分词与过去式相同，而不规则动词的过去分词则无统一的规律可言，需特别加以记忆。
（4）一般现在完成时通常与表示不确定的时间副词或短语连用如 just, already, before, never, ever, twice, three times等。
