Do you express admiration if completing Exercise 30.4 on page 71 by tomorrow? What is the appropriate usage of

Usage of "can" or "could" in different situations:

"Can" and "could" are both modal verbs that are used to express abilities, requests, possibilities, and permission. The main difference lies in their level of formality and time references.

- "Can" is used to talk about present abilities and general possibilities. For example, "I can swim" means that I have the ability to swim. "Can" is also used to make requests or ask for permission, for example, "Can I borrow your pen?"
- "Could" is the past tense of "can" and is used to talk about past abilities or possibilities. For example, "When I was young, I could run very fast." "Could" is also used to make polite requests. For example, "Could you please pass me the salt?"

Usage of "must" or "had to" and completing sentences with "must" or "have to":

- "Must" is used to express a strong obligation or necessity in the present. For example, "I must finish my homework before going out."
- "Had to" is the past tense of "have to" and is used to express an obligation or necessity that existed in the past. For example, "Yesterday, I had to clean my room."

Choosing the appropriate tense for "can," "could," or "be able to":

- "Can" is used to express ability or possibility in the present. For example, "I can speak English."
- "Could" is the past tense of "can" and is used to talk about past abilities or possibilities. For example, "When I was younger, I could play the piano."
- "Be able to" is more formal and can be used as an alternative to "can." It is used to express ability or possibility in both present and past tenses. For example, "I am able to solve this problem" or "She was able to finish the project on time."

Дополнительный материал:

1. I can"t find my keys. Can you please help me look for them?
2. When I was a child, I could climb trees easily.
3. I must finish my homework before I can go out and play.
4. Yesterday, I had to stay late at work to finish a project.
5. In the future, I hope to be able to travel the world and explore new cultures.

Совет:

To better understand the usage of "can" or "could," it is important to practice using these modal verbs in different contexts. Pay attention to the timeframe and the level of formality required in each situation. Similarly, for "must" or "had to," it is helpful to practice recognizing the difference in obligation between the present and the past. Additionally, practicing the appropriate use of "can," "could," or "be able to" will help you become more fluent in expressing abilities and possibilities.

Задание:

Complete the following sentences using "can," "could," or "be able to":

1. Yesterday, I ___________ swim across the river.
2. Do you ___________ pass me the salt, please?
3. We ___________ eat ice cream after dinner.
4. When I was young, I ___________ speak three languages fluently.
5. My sister ___________ play the guitar very well.