1. The cell phone vibrates when somebody calls me.

2. The cell phone vibrates when someone calls me at the phone.
3. The cell phone vibrates when a text message comes/arrives.
4. The cell phone vibrates when a text message is sent to the phone.
5. The cell phone vibrates when I get a call on the phone.
6. The cell phone vibrates when ___________.
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Are they grammatical? Correct errors, please.
In the sentences, is the subject 'the cell phone a specific phone and not in generic use?

Are they grammatical? Correct errors, please.

In the sentences, is the subject 'the cell phone' a specific phone and not in generic use?

"The cell phone" seems to refer to a particular phone. If you want to refer to cell phones in general, then use the plural form.

1 - OK
2 - ... on it.
3 - OK (or ... comes in.)
4 - (sentence 3 is better!)
5 - (I'd omit "on the phone" because it's repetitive.)
6 - The cell phone vibrates when an alarm goes off.

1. The sentence is grammatical and correct. The subject "the cell phone" refers to a specific phone and not a generic one.

2. The sentence is grammatical, but it does contain a redundancy. The phrase "at the phone" is unnecessary because it is already implied by the verb "call." It can be corrected to: "The cell phone vibrates when someone calls me."

3. The sentence is grammatical and correct. The subject "the cell phone" refers to a specific phone and not a generic one.

4. The sentence is grammatical but may be confusing. The phrase "a text message is sent to the phone" implies that someone else is sending the text message, rather than the person receiving it. To clarify, it can be rephrased to: "The cell phone vibrates when I receive a text message."

5. The sentence is grammatical and correct. The subject "the cell phone" refers to a specific phone and not a generic one.

6. The sentence is incomplete, and the subject is not provided. You can complete it with specific actions or events that may cause the cell phone to vibrate, such as: "The cell phone vibrates when I receive an email," "The cell phone vibrates when someone sends me a voicemail," etc.