在英语中，使用"it is adj that"结构来表达虚拟语气时，通常使用的形容词包括以下几种：
1. important（重要的）
It is important that we should all be on time.
2. necessary（必要的）
It is necessary that the meeting be postponed.
3. essential（基本的，必要的）
It is essential that everyone understands the rules.
4. vital（至关重要的）
It is vital that the information be kept confidential.
5. imperative（紧急的，必要的）
It is imperative that you attend the meeting.
6. urgent（紧迫的）
It is urgent that the report be completed by tomorrow.
7. desirable（值得希望的）
It is desirable that the experiment be repeated.
8. urgent（紧急的）
It is urgent that the matter be addressed immediately.
9. advisable（可取的，明智的）
It is advisable that you take an umbrella with you.
10. possible（可能的）
It is possible that he will come.
在这些结构中，形容词通常后面跟一个由should引导的动词原形，should有时可以省略。例如：
It is important that they (should) be informed about the change.
这些形容词后面引导的从句中，主语通常是"it"，而动词则用"be"的形式。
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