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several another some other other
Please go ahead That’s all right Take your time Not at all
read have read am reading will read
That’s right Not at all Take your time Please go ahead
Did; finish Have; finished Are; finished Do; finish
will do have to finish must finish would do
can’t; need mustn’t; may needn’t; must mustn’t; can
bought; haven’t finished have bought; shall finish bought; didn’t finish have bought; shall not finish
read have read am reading will read
read have read had read was reading
can’t; may mustn’t; must needn’t; may mustn’t; can
must, mustn’t must , don’t have to may, needn’t may , mustn’t
May, must Must, may Must, may Must, must
Please go ahead That's right Not at all Take your time
finish will finish must finish have finished
read have read had read was reading
How fast How soon How long How often
do; don’t have to do; mustn’t must; don’t have to must; mustn’t
can’t; may mustn’t; must needn’t; may mustn’t; can
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