5个情态被动语态句子（被动语态的句子含情态动词例句）

含情态动词的被动语态

情态动词+ be+过去分词

1. The environment in our city school be improved.

2. More laws must be made to prevent any possible dangers .

3. Teenagers should not be allowed to have part- time jobs.

4. Animals should not be trained to serve human beings.

5. When must this work be done?