Google Translation


D.Education
20BS. can-be able to, must-have to

Dimitris Sclias

20. Can, could - be able to.
-----------------------------
Can -> ability or permission.
 He can’t run very fast, can he ? No, he can’t.
 Can I go out please ? Yes, you can.
 She can never be happy, can she ? Of course, she can.
 
Could -> Simple Past of the verb Can.
 He could fix everything when he was here.
 Could I talk to you for a moment ? Not now, later.
 I tried but I couldn’t do my homework.
 
Can -> has only simple past ->  Could, so we replace the other tenses
      with the verb  Be able to
 
Simple  Present     : Ι can    -> I am able to
Simple  Future      :   -      -> Ι will be able to
Simple  Past        : Ι could  -> I was able to
Present Perfect     :   -      -> I have been able to
Past    Perfect     :   -      -> I had been able to
Future  Perfect     :   -      -> I will have been able to
 
Examples:
 He told me that he had been able to finish it.
 Was he able to walk again after the accident ? Yes, he was.
 Have you been able to meet them ? Yes, we have.
 Will you be able to solve that exercise ? I don’t think so.
 
b2. Must-> obligation, prohibition
 you must study. -> you must not smoke.
 
Must-> has only simple present, so we replace the other
       tenses with the ver Have to
 
Simple present   : Ι must  -> I have to, do I have to ?
Simple Future    :   -     -> Ι will have to
Simple Past      :   -     -> Ι had to -> did I have to ?
Present Perfect  :   -     -> I have had to
Past Perfect     :   -     -> I had had to
Future Perfect   :   -     -> I will have had to
 

Examoles:
-> Can I go out please ? Yes, you can.
-> Could I talk to you for a moment ?
-> Will he be able to walk again after the accident ? Yes, he will.
-> Must you go to school on Saturday ? No, we mustn't.
-> Did she have to go to hospital ? No, she didn't.
-> You will have to visit the dentist tomorrow.

To verify the results of the quiz, press the button ->
question 1

..........to speak to the manager yesterday?

A Must you
B Did you have
C Will you have
question 2

Jane.........to sing this difficult song.

A had
B could
C would
question 3

Tom................to give you the money back.

A must
B can
C will have
question 4

He..............meet his friend last night.

A can to
B will be able to
C was able to
question 5

Jane............play the piano when she was six.

A will be able to
B could
C was able
question 6

You...............write your exercises every day.

A must
B have
C will have
question 7

You.........do your homework now.

A must
B have
C will have
question 8

Could you run very fast when you were younger? Yes,...........

A I can
B I would
C I could
question 9

Will Mr. Black be able to go to the meeting? No,........

A he mustn't
B wouldn't
C he won't
question 10

When he was young, he..........run very fast.

A could
B will be able to
C was able
question 11

Mary...............go to school tomorrow.

A cans
B will be able to
C was able to
question 12

Mr. Black.............visit you next week.

A couldn't to
B won't be able to
C wasn't able to
question 13

.......I use the phone please?

A Can
B Will be able to
C Was able to
question 14

Tim............speak English very well.

A can
B will be able
C was able
question 15

He...............see the doctor yesterday.

A can
B will be able to
C was able to
question 16

.......go out please ? Yes, of course.

A Can I
B Will I be able
C Was I able
question 17

Helen.........be at home now.

A must
B have to
C will have
question 18

Mr. Green.......finish the job today.

A cans
B will be able to
C was able
question 19

They.................leave next week.

A must to
B had to
C will have to
question 20

Can John bring his friends to the party? Yes,.......

A he does
B he must
C he can

To see the results of the test, please press the button *Verify *
at the top of this page.