English Grammar: Modal Verbs and Conditional Sentences
Passive Voice Structure
The passive voice is formed using the following structure:
- Subject + to be (conjugated) + Past Participle
Modal Verbs and Their Uses
| Modal Verb | Function/Use | Example |
|---|---|---|
| must | Strong Obligation | You must stop when the traffic lights turn red. |
| Logical Conclusion / Certainty | He must be very tired. He's been working all day long. | |
| must not | Prohibition | You must not smoke in the hospital. |
| can | Ability | I can swim. |
| Permission | Can I use your phone, please? | |
| Possibility | Smoking can cause cancer. | |
| could | Ability in the Past | When I was younger, I could run fast. |
| Polite Permission | Excuse me, could I just say something? | |
| Possibility | It could rain tomorrow! | |
| may | Permission | May I use your phone, please? |
| Possibility / Probability | It may rain tomorrow! | |
| might | Polite Permission | Might |