Put ‘certain’, ‘almost certain’, ‘fairly certain’ or ‘very uncertain’ beside these sentences.
1. The phone’s ringing. It’s Roland. Certain_________
2.The phone’s ringing. It might be Roland. __________________________
3. A car is parking outside our house. That must be the Smiths. _____________________
4. From you description, the person you metcan’t be my cousin, Jeff. _________________
5. Are you saying it might not be possible for me to get a visa to visit USA? ____________
6. If he spent five years in America, he must speak English,I suppose. ________________
7. It could be John who is knocking on the door. ____________Information about modal verbs:
COULD HAVE | SHOULD HAVE |
OPTIONS OR OPPORTUNITIES NOT TAKEN | IMPORTANT OPTIONS OR ADVICE NOT TAKEN |
"Could have" is used for non-essential advice.There are many things that could have been done. Maybe, they would have made a difference, maybe not. | "Should have" is used for more urgent advice. These are the key, most important, things thatwould have made a difference. (After the Titanic Inquiry, they became recommendations for changes in maritime rules.) |
Passengers could have taken other smaller trans-atlantic ships. | The ownersshould have supplied enough lifeboats for everyone. |
The captain could have chosen a more southern | The captain should have insisted on better |
'Might' suggests a smaller possibility than'may', there is in fact little difference. We express the greatest uncertainty with might; the greatest certainty with must/can’t.
He might be right. He might know the answer. (very uncertain)
He could be right. He would know the answer. (fairly certain)
He must be right. He must know the answer. (almost certain)
He can’t be right. He can‟t know the answer. (almost certain)...