I may/might have completed
the report.
• His maths
may/might have improved
by the time the exam comes round.
We use
may/might
(not 'can')
+ be + -ing
to say it is possible that something is happening now or
to talk about a possible future arrangement:
• Malcolm isn't in his office. He
may/might be working
at home today.
• When I go to Vienna
I may/might be staying
with Richard, but I'm not sure yet.
Could
can be used in the same patterns instead of
may
or
might,
particularly when we want to
show that we are unsure about the possibility.
Notice that we can combine these two patterns to talk about possible situations or activities that
went on over a period of time until now (see also Unit 8):
• David didn't know where the ball was, but he thought his sister
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