Module 3 · Modal Verbs

Can & Could

Intermediate50 min25 questions7 sections

Step 1

Quick Look

CAN is the busiest modal in English — ability, permission, requests, possibility, even deduction. COULD is its past and its polite twin. This chapter also covers BE ABLE TO, the substitute that works in tenses where can cannot go, and the one distinction that separates advanced speakers: could vs. was able to for past achievements.

Sentence TypeStructure + Example

Ability

She can close difficult deals. / In college, I could run 10 km.

Permission / request

Can I use your charger? / Could you send the papers? (more polite)

Negative deduction

That can’t be the owner — the owner is in Dubai. (I’m sure it’s not)

The golden rule: COULD = general past ability (I could swim as a child — any time, in general). For ONE specific past achievement, English refuses could and demands WAS ABLE TO or MANAGED TO: ‘The lift was stuck, but we were able to open it’ (NOT could open). In the negative, both work: couldn’t open = wasn’t able to open.

Could or was able to?

Could = general past ability. One specific success = was able to / managed to. In the negative, both work.

Step 2

When to Use It

Use 1

Present ability

Skills and capacities, now.

Our team can handle both sale and lease agreements.
She can read blueprints faster than the architect.
I can’t attend both registries on the same day.

Use 2

General past ability — COULD

What you were able to do in general, in that period.

Before the knee surgery, he could climb all five floors.
In the 2000s, you could buy land here for 800 a yard.

Use 3

One specific past success — WAS ABLE TO / MANAGED TO

A single event where you succeeded — could is banned here (except in negatives).

The file was stuck for months, but we were able to clear it last week.
He managed to reach the court just before the hearing.
We couldn’t convince the seller. (negative — could returns)

Use 4

Permission and requests

Can = casual; could = softer, more polite. (Full politeness system in Chapter 9.)

Can I take a photo of the layout?
Could you hold the payment till Monday?
You can use the office printer for personal work — within limits.

Use 5

Possibility and negative deduction

Can = things that sometimes happen; can’t = I’m sure it’s not true.

Delhi summers can cross 47 degrees. (it happens)
He can’t be serious about that price. (impossible, surely)
This can’t be the original document — the stamp is missing.

Use 6

BE ABLE TO — the tense substitute

Can has no future or perfect forms; be able to fills every gap.

You will be able to see the sample flat from next week. (NOT: will can)
I haven’t been able to reach him since Tuesday.
She wants to be able to work from home.

Be able to fills the gaps

Can has only two forms (can, could). For every other slot – future, perfect, infinitive – use be able to.

Step 3

Hindi Concept Note

अHindi Concept Noteहिंदी में समझिए

CAN/COULD = ‘सकना’। वह आ सकती है She can come. वह आ सकती थी She could come.

लेकिन एक छुपा rule है जो Hindi से पकड़ में नहीं आता: past की एक ख़ास कामयाबी के लिए could नहीं — was able to / managed to लगता है।

ताला जाम था, पर हम खोल पाए।

The lock was jammed, but we were able to open it. (could open ग़लत!)

‘नहीं कर पाए’ में could वापस आ जाता है: हम उसे मना नहीं पाए।

We couldn’t convince him.

और future में can नहीं चलता — ‘कर पाओगे’ के लिए will be able to: तुम अगले हफ़्ते देख पाओगे। You will be able to see it next week. (will can कुछ नहीं होता!)

Step 4

Common Mistakes Hindi Speakers Make

Wrong

Right

Why

The gate was locked, but we could open it.

The gate was locked, but we were able to open it.

One specific past success was able to / managed to. Could is only for general past ability.

You will can visit the site next month.

You will be able to visit the site next month.

Two modals can never sit together. Future ability = will be able to.

I could to finish the report yesterday.

I was able to finish the report yesterday. / I managed to finish...

Two errors: no ‘to’ after could, and a specific achievement rejects could anyway.

He cans speak Haryanvi fluently.

He can speak Haryanvi fluently.

Frozen Rule 2 — no -s, ever.

It can be raining in Mussoorie right now. (guess)

It could / might be raining in Mussoorie right now.

A guess about right now takes could/might, not can. Can = general possibility only.

I don’t can come today.

I can’t (cannot) come today.

No do-support — the negative sits on the modal itself.

Step 5

Signal Words

Can/could signals and traps:

General skill (any time) can (now) / could (past)

One past event + success was able to / managed to

One past event + failure couldn’t / wasn’t able to (both fine)

Future or perfect ability be able to (will be able to, has been able to)

‘Surely not!’ can’t be (negative deduction)

Step 6

Practice

Set A

Fill in the blanks

0 / 10

1
My grandfather (can/speak) five languages — people came just to hear him.
2
The server was down all morning, but IT (be able to/restore) it by lunch.
3
you (can/forward) me the RERA certificate?
4
You (will/be able to/register) online from next quarter.
5
That (can/not/be) Mr. Khanna — he never comes before eleven.
6
In those days, we (can/park) anywhere on this road.
7
She hasn’t (be able to/sleep) properly since the court notice came.
8
Traffic on NH-24 (can/get) brutal after 5 p.m. (general truth)
9
We tried for hours but (can/not/locate) the boundary markers.
10
He (manage to/get) the file signed just before the officer left.

Set B

Correct the mistake

0 / 8

11
The lights went out, but the electrician could fix them within an hour. (one specific success)
12
You will can see the difference after the paint job.
13
I can swimming since childhood.
14
Does she can operate the new software?
15
He could passed the exam last month. (one attempt, he succeeded)
16
We didn’t could finish the audit on time.
17
That can be Sharma ji at the door — he said he’d never come back. (you’re sure it’s not)
18
I could to lift heavy weights in my army days.

Set C

Translate into English

0 / 7

19
वह बचपन से तैर सकता है... मतलब, बचपन में भी तैर सकता था।
20
क्या तुम मुझे वह file भेज सकते हो?
21
दरवाज़ा जाम था, पर हम उसे खोल पाए।
22
तुम अगले महीने से online payment कर पाओगे।
23
यह सच नहीं हो सकता!
24
हम उसे समय पर ढूँढ नहीं पाए।
25
पहले मैं पूरी रात जाग सकता था, अब नहीं।

Step 7

Answer Key

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Answers · Set A

could speak

was able to restore

Can you forward

will be able to register

cannot (can’t) be

could park

been able to sleep

can get

could not (couldn’t) locate

managed to get

Answers · Set B

The lights went out, but the electrician was able to fix them within an hour. (Specific success was able to.)

You will be able to see the difference after the paint job. (No double modals.)

I have been able to swim since childhood. / I can swim — I learnt as a child. (Can + base verb; duration have been able to.)

Can she operate the new software? (No do-support.)

He was able to pass / managed to pass the exam last month. (One achievement.)

We couldn’t (could not) finish the audit on time. (Negative sits on the modal.)

That can’t be Sharma ji at the door. (Negative deduction can’t.)

I could lift heavy weights in my army days. (No ‘to’; general past ability could is correct here.)

Answers · Set C

He has been able to swim since childhood. / He could swim even as a child.

Can you send me that file? / Could you send me that file?

The door was jammed, but we were able to open it. / ...but we managed to open it.

You will be able to make online payments from next month.

This can’t be true! / That cannot be true!

We couldn’t find him in time. / We were not able to locate him on time.

I could stay up all night earlier; now I can’t.

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Next up · Chapter 3May & Might

Formal permission, shades of possibility, and why ‘may be’ and ‘maybe’ are two different words.