1. Make sure you go to bed early.

2. Make sure you play ping-pong with him.
3. Make sure you talk with the person.
4. Make sure you go back home early.
5. Make sure you call your mother.
6. Make sure you send the money to him.
7. Make sure you take a taxi.
8. Make sure you go to school by subway.
9. Make sure you turn off the lights when you go out.
10. Make sure you close the crtains when you go out.
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I've made sentences starting from 'Make sure' Are they all grammatical? check them, please.

In 10 --- curtains

Everything else is fine.

To check if the sentences are grammatically correct, we can analyze each one individually. Here are the sentences:

1. Make sure you go to bed early.
- This sentence is grammatically correct. It is an imperative sentence instructing someone to ensure they go to bed early.

2. Make sure you play ping-pong with him.
- This sentence is grammatically correct. It is instructing someone to ensure they play ping-pong with another person.

3. Make sure you talk with the person.
- This sentence is grammatically correct. It instructs someone to ensure they have a conversation with a specific person.

4. Make sure you go back home early.
- This sentence is grammatically correct. It instructs someone to ensure they return home early.

5. Make sure you call your mother.
- This sentence is grammatically correct. It instructs someone to make a phone call to their mother.

6. Make sure you send the money to him.
- This sentence is grammatically correct. It instructs someone to ensure they send money to a specific person.

7. Make sure you take a taxi.
- This sentence is grammatically correct. It instructs someone to ensure they use a taxi as a mode of transportation.

8. Make sure you go to school by subway.
- This sentence is grammatically correct. It instructs someone to use the subway as a means of getting to school.

9. Make sure you turn off the lights when you go out.
- This sentence is grammatically correct. It instructs someone to ensure they switch off the lights before leaving a place.

10. Make sure you close the curtains when you go out.
- This sentence is grammatically correct. It instructs someone to ensure they shut the curtains before leaving a place.

Overall, all the sentences starting with "Make sure" are grammatically correct and effectively convey their intended instructions.