4. have to意为“必须, 不得不”, 与must意义相似,
但 must强调人的主观意识, 而have to强调客观的必要。 have to变否定时要借助于助动词do, 表示“不必”。 5. can和have to后面都接动词原形。can没有人称和 数的变化, 而have to有。
用can或have to的适当形式填空。 1. ________ (can) you swim when you were 8 years old? 2.
—___________(can) I use your bike? ???? —Sure!
3. Mr Smith _________(can not) be at school. He left
for Shanghai this morning. Could Can / Could can’t 4. Tom ____________(have to) leave because
he doesn’t have his ID card with him. 5. You ____________(not have to) do your
homework now. has to don’t have to
Jeff
can
/
can’t
come to the party.
Mary
can
/
can’t
come to the party.
May
can
/
can’t
come to the party.
Claudia
can
/
can’t
come to the party.
Paul
can
/
can’t
come to the party. 2a
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