Unit 13 - High-Frequency Words
Unit Goal
In this unit, you will learn words about nature, groups of people, and actions in the past. You will also learn simple phrases about helping a river and growing plants.
Can-do: I can talk about a river, growing things, groups of people, and past actions.
Key Vocabulary
| Word / Phrase | Meaning | Example |
|---|---|---|
| grow | to become bigger; to make plants live and get bigger | We grow tomatoes. |
| took | past form of take | She took a book home. |
| four | the number 4 | I have four pencils. |
| began | past form of begin | The game began at noon. |
| river | a long natural waterway | The river is near our town. |
| who took | a phrase to talk about a person that took something | Who took my bag? |
| clean the river | remove trash from a river | We clean the river every year. |
| can they grow | a question about growing something | Can they grow flowers here? |
| four groups of | four sets or collections of something | There are four groups of students. |
| began to cry | started crying | The baby began to cry. |
Picture and Context
The children are helping nature. They clean the river. Plants grow near the water. People work together in groups.
Language Focus: Talking About the Past
Past Tense Words
Some verbs change in the past.
| Present | Past |
|---|---|
| take | took |
| begin | began |
Examples:
- I take a photo. → I took a photo.
- The class begins. → The class began.
Questions with "Can"
Use Can + subject + verb to ask about ability or possibility.
Pattern:
Can + they + grow + ... ?
Examples:
- Can they grow vegetables?
- Can they grow flowers here?
Worked Examples
Example 1
Sentence: We clean the river every year.
Meaning: We help remove trash from the river.
Example 2
Sentence: Four groups of students came to help.
Step: "Four groups of" means there are four different teams.
Example 3
Sentence: The child began to cry.
Step: "Began" means "started."
Meaning: The child started crying.
Quick Review
- grow = become bigger or make plants bigger
- took = past form of take
- began = past form of begin
- river = a natural waterway
- four = number 4
- Use Can they grow...? to ask a question.
- Use began to cry to say someone started crying.
🔑 Đáp án & Giải thích
grow: phát triển, trồng cây.
took: quá khứ của "take" (lấy, mang).
four: số bốn.
began: quá khứ của "begin" (bắt đầu).
river: con sông.
who took: ai đã lấy/mang đi.
clean the river: làm sạch dòng sông.
can they grow: họ có thể trồng/phát triển được không?
four groups of: bốn nhóm.
began to cry: bắt đầu khóc.
Hai động từ bất quy tắc cần nhớ: take → took và begin → began.