1. Make sure you unplug the TV when you go out.
2. Make sure that you unplug the TV when you go out.
3. Make sure you should unplug the TV when you go out.
4. Make sure you unplug the TV before you go out.
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Are they all grammatical? Can we use 'should,' 'must,' etc before 'unplug'?
1, 2 and 4 are correct. 3 is not. You can make sure you SHOULD, but that doesn't say you'll DO it.
Thank you for your help. What about the following? Are they grammatical?
5. Make sure you don't plug the TV when I am out.
6. Make sure you don't eat sweets.
7. make sure you don't play cards.
8. Make sure yoiu don't drink.
9. Make sure you don't eat fast food.
10. Make sure you don't eat the bread on the table.
5. Make sure you don't plug the TV in ...
And correct capital in 7 and 'you' in 8.
Out of the four sentences provided, sentences 1, 2, and 4 are grammatically correct. However, sentence 3 is not grammatically correct.
Starting with sentence 3, "Make sure you should unplug the TV when you go out," it is incorrect because the word "should" is redundant in this context. The phrase "make sure" already conveys the meaning of advising or recommending something, so using "should" is unnecessary.
Sentence 1, "Make sure you unplug the TV when you go out," is grammatically correct and conveys a clear message to unplug the TV before leaving the house. The use of "make sure" serves as an instruction or reminder.
Sentence 2, "Make sure that you unplug the TV when you go out," is also grammatically correct. The addition of the conjunction "that" between "make sure" and "you unplug" does not change the meaning of the sentence but provides a smoother flow and emphasizes the instruction.
Sentence 4, "Make sure you unplug the TV before you go out," is another grammatically correct alternative. The word "before" is used instead of "when" to specify that unplugging the TV should be done prior to leaving the house.
Regarding the use of "should" or "must" before "unplug," these modal verbs can be used to emphasize the need or obligation to perform the action. For example:
- "You should unplug the TV when you go out" emphasizes that it is advisable, but not mandatory, to unplug the TV.
- "You must unplug the TV when you go out" emphasizes that it is necessary and obligatory to unplug the TV.
In summary, sentences 1, 2, and 4 are grammatically correct, and it is possible to use modal verbs like "should" or "must" before "unplug" depending on the intended emphasis.