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Gutasniff Posted 19 years ago
Grammar
Have to or must ?
Hi,
I'm trying to do an excercise. I have to chose which one is the INCORRECT answer.
Although human beings aren't able to percieve such changes, it is thought the the sensitive nervous systems of some animals COULD / HAVE TO / MUST be affected by them.
The answer is apparently "have to"
Now, I agree in that it "sounds wrong" although I can't understand in grammatical terms.
Grammaticallt it seems to be that each option is correct! "could" refering to possibility and "must to" and "have to" being used to express certainty ?
Thanks
I'm trying to do an excercise. I have to chose which one is the INCORRECT answer.
Although human beings aren't able to percieve such changes, it is thought the the sensitive nervous systems of some animals COULD / HAVE TO / MUST be affected by them.
The answer is apparently "have to"
Now, I agree in that it "sounds wrong" although I can't understand in grammatical terms.
Grammaticallt it seems to be that each option is correct! "could" refering to possibility and "must to" and "have to" being used to express certainty ?
Thanks
Top answer
Of the three answers, only ' have to ' seems wrong to me. The other two are possible, but ' must ' is not very scientific.
- Of the three answers, only ' have to ' seems wrong to me.
- The other two are possible, but ' must ' is not very scientific.
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2 Answers
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Of the three answers, only 'have to' seems wrong to me. The other two are possible, but 'must' is not very scientific.
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