Can vs. Could – English Grammar Exercises for A2
Your friend is feeling sad and discouraged about their English studies. You are texting them to cheer them up by reminding them of how much they have improved. Read the conversation carefully and choose the best option (A, B, C, or D) to complete each sentence.
1 “Please don’t be sad! When you first started learning English last year, you ______ introduce yourself.”
(A) couldn’t
(B) can’t
(C) didn’t can
(D) wasn’t could
2 “But look at you today! You ______ have a 30-minute conversation with anyone.”
(A) could
(B) can
(C) cans
(D) are can
3 “Remember our trip to London? You ______ even order a coffee by yourself back then.”
(A) can’t
(B) don’t can
(C) couldn’t
(D) couldn’t to
4 “Now, you ______ order food, ask for directions, and talk to the waiters easily.”
(A) could to
(B) can
(C) could
(D) cans
5 “Two months ago, you ______ understand a single word in English movies.”
(A) couldn’t
(B) can’t
(C) didn’t can
(D) wasn’t can
6 “Today, you ______ watch entire films on Netflix without using subtitles!”
(A) could
(B) could to
(C) can
(D) can to
7 “Don’t be so hard on yourself. Before you joined this class, you ______ read a simple menu.”
(A) can’t
(B) couldn’t
(C) didn’t could
(D) not could
8 “And now you ______ read whole news articles on the internet.”
(A) can
(B) could
(C) cans
(D) do can
9 “You used to be so shy because you ______ pronounce the ‘th’ sound correctly.”
(A) can’t
(B) don’t can
(C) couldn’t to
(D) couldn’t
10 “But after practicing so much, you ______ say it perfectly now!”
(A) can
(B) could
(C) are can
(D) can to
11 “Friend: I feel like my grammar is still terrible. I ______ remember the past tense rules.”
(A) couldn’t
(B) can’t
(C) don’t can
(D) didn’t can
12 “You: Yes, but think about your progress! Last month, you ______ even use the verb ‘to be’ correctly.”
(A) can’t
(B) couldn’t
(C) didn’t could
(D) wasn’t could
13 “Right now, you ______ write full emails to your foreign boss. That is huge!”
(A) can to
(B) could
(C) can
(D) cans
14 “I remember when you ______ understand English jokes. You always looked confused.”
(A) can’t
(B) couldn’t
(C) don’t can
(D) couldn’t to
15 “Just yesterday, you laughed at my joke! You ______ finally understand native humor.”
(A) could
(B) can
(C) cans
(D) are can
16 “In the beginning, you ______ count to 100 without making a mistake.”
(A) couldn’t
(B) can’t
(C) didn’t can
(D) wasn’t can
17 “Today, you ______ talk about big numbers and prices without stopping to think.”
(A) could
(B) could to
(C) can
(D) can to
18 “Last semester, you ______ pass the basic speaking test because you were too nervous.”
(A) can’t
(B) couldn’t
(C) not could
(D) didn’t could
19 “But look at your latest score! You ______ clearly see that you got an A!”
(A) can
(B) could
(C) cans
(D) are can
20 “Maybe you ______ see your own progress right now, but I promise you are doing amazing!”
(A) couldn’t
(B) can’t
(C) don’t can
(D) didn’t can
ANSWER KEY & EXPLANATIONS
1 Key: (A) couldn’t
Explanation: – Why it’s correct: “Last year” places the inability in the past. We use “couldn’t” to describe a lack of ability in the past.
- Structural Errors (C, D): You cannot use “didn’t” or “wasn’t” with a modal verb.
2 Key: (B) can
Explanation: – Why it’s correct: “Today” brings the focus to the present. You are celebrating their current ability, so “can” is required.
- Structural Errors (C, D): Modals never take an “-s”, and you cannot combine “are” with “can”.
3 Key: (C) couldn’t
Explanation: – Why it’s correct: “Remember our trip… back then” shows this is a past memory.
- Structural Errors (B, D): “Don’t can” is invalid. You cannot put “to” after “couldn’t”.
4 Key: (B) can
Explanation: – Why it’s correct: “Now” indicates a present ability.
- Why others are wrong: (A) has “to”. (C) is for the past. (D) has an “-s”.
5 Key: (A) couldn’t
Explanation: – Why it’s correct: “Two months ago” is a past time marker.
- Structural Errors (C, D): “Didn’t can” and “Wasn’t can” are grammatically invalid.
6 Key: (C) can
Explanation: – Why it’s correct: “Today” highlights the current, improved ability.
- Why others are wrong: (A) is for the past. (B) and (D) illegally add “to” after the modal.
7 Key: (B) couldn’t
Explanation: – Why it’s correct: “Before you joined this class” points to a past inability.
- Structural Errors (C, D): “Didn’t could” and “Not could” are structurally wrong. It must be “could not” or “couldn’t”.
8 Key: (A) can
Explanation: – Why it’s correct: “And now” shifts the timeline back to present capabilities.
- Why others are wrong: (B) is past. (C) has an “-s”. (D) illegally uses “do” with “can”.
9 Key: (D) couldn’t
Explanation: – Why it’s correct: “Used to be” is a major clue that we are talking about a past state and past limitation.
- Why others are wrong: (A) is present. (B) uses “don’t”. (C) adds “to”.
10 Key: (A) can
Explanation: – Why it’s correct: “Now” indicates the friend has gained this physical ability in the present.
- Why others are wrong: (B) is past. (C) uses “are”. (D) adds “to”.
11 Key: (B) can’t
Explanation: – Why it’s correct: The friend says “I feel like my grammar is still terrible.” They are expressing a frustration they have right now, so we use the present negative “can’t”.
- Why others are wrong: (A) is past. (C) and (D) are invalid.
12 Key: (B) couldn’t
Explanation: – Why it’s correct: “Last month” points to a past failure/inability to console the friend.
- Why others are wrong: (A) is present. (C) and (D) are invalid.
13 Key: (C) can
Explanation: – Why it’s correct: “Right now” describes their impressive current skill.
- Why others are wrong: (A) adds “to”. (B) is past. (D) adds “-s”.
14 Key: (B) couldn’t
Explanation: – Why it’s correct: “I remember when…” refers to a time in the past.
- Why others are wrong: (A) is present. (C) and (D) are invalid.
15 Key: (B) can
Explanation: – Why it’s correct: Though the action (laughing) was yesterday, “You finally understand” is a general truth about their ability moving forward into the present. “Can” is the natural fit here.
- Why others are wrong: (A) “could” sounds like they only had the ability yesterday but lost it today. (C) and (D) are invalid.
16 Key: (A) couldn’t
Explanation: – Why it’s correct: “In the beginning” is a past time marker.
- Why others are wrong: (B) is present. (C) and (D) are invalid.
17 Key: (C) can
Explanation: – Why it’s correct: “Today” highlights present speaking fluency.
- Why others are wrong: (A) is past. (B) and (D) have “to”.
18 Key: (B) couldn’t
Explanation: – Why it’s correct: “Last semester” is in the past.
- Why others are wrong: (A) is present. (C) is the wrong word order. (D) is invalid.
19 Key: (A) can
Explanation: – Why it’s correct: The speaker is pointing at the score right now (“look at your latest score!”). They have the ability to see it in the present moment.
- Why others are wrong: (B) is past. (C) and (D) are invalid.
20 Key: (B) can’t
Explanation: – Why it’s correct: “Right now” means the friend is currently unable to see their own success because they are sad.
- Why others are wrong: (A) is past. (C) and (D) are invalid.
GRAMMAR POINTS TO REMEMBER
- The Power of Contrast (Past vs. Present):
- One of the best ways to show progress is by contrasting Couldn’t (what you lacked the ability to do in the past) with Can (what you have the ability to do now).
- Example: “You couldn’t speak English last year, but now you can!”
- Identifying the Timeline:
- Use Could / Couldn’t when you see past markers: yesterday, last year, when you started, two months ago, in the beginning, back then.
- Use Can / Can’t when you see present markers: now, right now, today, lately.
- Golden Grammar Rules for Modals:
- No DO/DID: Modals do not need auxiliary verbs to make negatives or questions.
- Say: I couldn’t / I can’t.
- NEVER say: I didn’t could / I don’t can.
- No TO: Modals are followed directly by the base verb.
- Say: You can read.
- NEVER say: You can to read.
- No -S: Modals never change form, even for he/she/it.
- Say: She can speak.
- NEVER say: She cans speak.