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2. Which of the underlined phrases in the extracts:

■ express ability (or inability):

a) in the present?

b) in the past?

■ are about ability (or inability):

a) to do something at any time?

b) to do something on one occasion?

Language reference Ability

Expressing present ability

We use can / cannot / can't:

Sally Warmer, of Darlington, can squeeze juice from an orange between her shoulder blades. Be able to is also possible:

Bob is able to help aeroplanes park without using hand signals.

Expressing ability in the future

We use will be able to to make predictions:

By 2050 people will be able to learn a language by taking a pill.

Expressing ability with perfect forms

We use be able to:

He's been able to speak fluent French since he was a child. (present perfect)

If she'd been able to type she might have got the job. (past perfect)

Expressing past ability

We use different verbs for general and specific past ability:

■ to describe ability at any time in the past (general ability) we use could, couldn't or (not) be able to:

Alex the parrot could / was able to name more than 40 objects.

I couldn't / wasn't able to dance until I met you.

■ to describe ability on one occasion only in the past (specific ability) we use couldn't (but not could), (not) be able to, (not) manage to:

I wasn't able to phone her last night.

I managed to get a lift home after the party.

I didn't manage to phone him yesterday.

I couldn't get out of bed on Monday morning.

General ability Specific ability

could, couldn't, be able to couldn't, be able to, manage to

Manage to means you are able to do something, but only with difficulty:

I managed to start the car, but only after ten minutes of trying.

Notice the different negatives of manage to:

I didn't manage to get out. (I wanted to get out but I couldn't)

I managed not to see him. (I tried not to see him and I succeeded)

1. In sentences 1-10, do the underlined verbs and expressions refer to the past, present or future or are they a perfect form? Do they talk about general (g) or specific (s) ability?

Sentence

Tense

General ability (g) or specific ability (s)

Example: When I was a child I was able to stand on my head easily.

past

g

1. I managed to get a doctor's appointment yesterday.

2. New research suggests that people will soon be able to lose weight by taking pills.

3. People are able to do all sorts of things today that were impossible only 30 years ago.

4. My uncle can't hear very well.

5. Sue was unable to understand why I wanted to keep that old chair.

6. I didn't manage to phone my sister last night.

7. I haven't been able to run since I broke my leg last year.

8. Tyrannosaurus Rex was able to bite with the force of a lorry on each tooth.

9. I'm not able to do the tango. It's really difficult.

10. My friend Alice lost her house keys yesterday, but she was able to climb in through the bathroom window.

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