It depends on what you're trying to say.
If you had the possibility of being a doctor, you could have been a doctor.
If it was in your best interest to be a doctor, you should have been a doctor.
Or if you're trying to distinguish between "could of" and "could have", it should be, you could have been a doctor.
"You could have been a doctor" is correct. This sentence implies that becoming a doctor was a possibility in the past. "You should have been a doctor" implies that becoming a doctor was the correct choice in the past.
No, the sentence is not grammatically correct. A more correct version could be: "Why was she promoted?" or "She was promoted, but why?"
No, the sentence is not correct. It should be "The boy could blow out the candle." The verb "blow" needs to be in the base form after "could."
"He could not have been there" is the correct sentence. It conveys the idea that he was unable to have been at the specified place.
No, the correct sentence would be: "Is the sculpture free form?"
Yes, the sentence is grammatically correct.
No, the sentence is not grammatically correct. A more correct version could be: "Why was she promoted?" or "She was promoted, but why?"
No, the sentence is not correct. It should be "The boy could blow out the candle." The verb "blow" needs to be in the base form after "could."
In the sentence " You can see the anticipation in his face" the "in" should be replaced. Expressions are usually described as being "on" the face. So the correct sentence should be worded as " You could see the anticipation on his face. "
"He could not have been there" is the correct sentence. It conveys the idea that he was unable to have been at the specified place.
Depending on the sentence, not unless could be the correct form.
The "Y" in you should not be capitalized and while it takes only a noun and a verb to make a sentence - which "I write you" has - it isn't a correct sentence because the tense of the verb is incorrect. "I will write you" would be a correct sentence with the correct verb tense. You could begin a sentence, albeit it sounds a bit odd, with the words "I write you" as in "I write you this letter today in an attempt to appeal to your empathetic side", however "I write you" is not a correct sentence alone.
The verb in the given sentence, "could be" is in a conditional present tense.
Him and I have a report to do.
rule that could explain what makes a sentence grammatically correct or not before the noun."
No, the correct sentence would be: "Is the sculpture free form?"
This sentence is grammatically correct.
Yes, the sentence is grammatically correct.