This worksheet helps students master the difference between 'ago', 'last', and 'yesterday' through clear examples and practice sentences.

Let's solve this Grammar Worksheet: Past Time Words step by step.

The goal is to fill in the blanks with the correct past time word from the three categories provided:

- AGO – used with a specific amount of time (e.g., "three weeks ago")
- LAST – used with a time period (e.g., "last night", "last summer")
- YESTERDAY – used with specific parts of yesterday (e.g., "yesterday morning")

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✔ Here are the correct answers with explanations:

1. My brother found a new job three weeks ___
→ ago
*Explanation:* We use "ago" with a specific duration ("three weeks"). So, "three weeks ago".

2. What time did you get up ___ morning?
→ yesterday
*Explanation:* "Yesterday morning" is a specific part of the past day. The blank refers to "morning", so it must be "yesterday morning".

3. (A) When did you get back from Korea? (B) I got back two weeks ___
→ ago
*Explanation:* "Two weeks ago" is the correct expression for a time that ended two weeks before now.

4. Jack went to bed very late ___ night.
→ last
*Explanation:* "Last night" refers to the night before today. It's a common phrase.

5. Our class had a very difficult math exam ___ Friday.
→ last
*Explanation:* "Last Friday" refers to the Friday of the previous week.

6. We had a picnic at the park ___ morning.
→ yesterday
*Explanation:* "Yesterday morning" is the correct phrase for the morning of the day before today.

7. I began to study Spanish ___ September.
→ last
*Explanation:* "Last September" refers to the month of September in the previous year.

8. Marie felt sick, so she stayed home ___ afternoon.
→ yesterday
*Explanation:* "Yesterday afternoon" is the correct way to refer to the afternoon of the previous day.

9. Dinosaurs lived on your planet millions of years ___
→ ago
*Explanation:* "Millions of years ago" is the standard expression for a distant past.

10. Your friend just called you an hour ___ but you were out.
→ ago
*Explanation:* "An hour ago" means one hour before now.

11. Today is Tuesday. What day was it ___?
→ last
*Explanation:* "Last" is used here because we're referring to "last Tuesday" (the Tuesday of the previous week).

12. Our family travelled to Brazil ___ summer.
→ last
*Explanation:* "Last summer" refers to the summer season of the previous year.

13. Did you really finish your science project two days ___?
→ ago
*Explanation:* "Two days ago" is the correct expression for a time two days before now.

14. I moved to this city ___ year.
→ last
*Explanation:* "Last year" refers to the calendar year before this one.

15. Sarah and Mark got married ___ month.
→ last
*Explanation:* "Last month" refers to the month that just passed.

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✔ Final Answers:

1. ago
2. yesterday
3. ago
4. last
5. last
6. yesterday
7. last
8. yesterday
9. ago
10. ago
11. last
12. last
13. ago
14. last
15. last

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🔍 Summary of Rules:

- Use AGO with a specific amount of time (e.g., "three weeks", "an hour").
- Use LAST with time periods (e.g., "night", "week", "month", "year").
- Use YESTERDAY with parts of the day (e.g., "yesterday morning", "yesterday evening").

This worksheet helps students distinguish between these three types of past time expressions correctly.