How do we use these modal verbs?

Duda · #1 (permalink) Tue Mar 15, 2005 12:21 pm *How do we use these modal verbs?*

Test No. incompl/elem-33 "Responses (6)", question 9

John: 'By the way, I've paid the taxi driver.'
Sue: '.........'

(a) You mustn't have.
(b) You couldn't have.
(c) You shouldn't have.
(d) You can't have.

Test No. incompl/elem-33 "Responses (6)", answer 9

John: 'By the way, I've paid the taxi driver.'
Sue: 'You shouldn't have.'

Correct answer: (c) You shouldn't have.
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HI Alan,
please what is the differend between Shoud, must and will.
I thank for your answer

Torsten · #2 (permalink) Tue Mar 15, 2005 21:51 pm *Modal verbs*

Should and must are modal verbs, will is a help (auxiliary) verb.
Should expresses a strong recommendation while must indicates an obligation.
More on modal verbs here:
http://www.english-test.net/forum/ftopic2222.html
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Felicity2002 · #3 (permalink) Sat Jun 20, 2009 2:52 am *How do we use these modal verbs?*

Hi All

I just wonder what 'You shouldn't have.' means in this context. Is it just a polite expression of acceptance?

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