關於6題Grammar~~

Imperative (祈使句) 定義：用于表達命令、请求、劝告、警告、禁止等的句子叫做祈使句(又叫命令句)

命令句因對象是你（即主語）, 所以subject 通常都省略. (The implied subject is you.) 命令句的動詞都為一般present simple tense，例：
　　Go and wash your hands.(order)
　　Be quiet, please.（request）
For conditional zero sentence, we can use an imperative instead of a present tense in the result clause to give a general instruction.（Imperative Sentence）. The implied subject is “you”.
If ... verb (present simple tense)...., ...... main verb (present simple tense)........
1. If the machine breaks down,(phone) phone the maintenance department.

2. If you (not understand) don’t understand a word, look it up in adictionary.

3. Please (tell) tell your head of department if you want to attend theseminar.

4. Please (not enter) don’t enter the room if the red light is showing.

5. If you can't find the room, (ask) ask at reception.

6. If you (be) are tired, let's take a break.

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一係你自己加noun,,如果唔係d問題根本就出得有問題,,,
好似If the machine breaks down,(phone)____ the maintenance department.
of呢句係子句,,,個母句都係要係句子,,無可以唔出動詞,,我本身有諗過出ing,但咁樣會錯文法