Yes!
Yes "She had a car" is correct in the sense that She used to have a car before but it is not there right now. It would be incorrect to the sense that She had a meal which means she ate the meal..
The efficiency goes to 30 MPH in this car.
The sentence "He gets farts in the car" should be written like this. "He gets in the car and farts" or "He farts in the car
The correct one would be HAS DAMAGED. It is because the speaker is saying after the car has been damaged.
No, that sentence should read there was a man and a woman in the car. If you were to say there were two people in the car, then the verb is plural for a plural subject, two people. But this way, the subject is a man, which is singular. The woman is also singular. The implied grammar is this: there was a man in the car and there was also a woman in the car. Singular in both cases.
Yes, perfectly correct.
Remove 'it' word ... My car is beautiful
To correct the unclear reference, you must reword the sentence. The sentence isn't clear that the pronoun 'it' refers to the suit or the car. Reworded: Take the suit to be cleaned when you take out the car. Put the suit in the car and take the car to be cleaned.
customers are going to purchase a car
Yes, the sentence "Yesterday Tom washed the car" is grammatically correct.
Yes "She had a car" is correct in the sense that She used to have a car before but it is not there right now. It would be incorrect to the sense that She had a meal which means she ate the meal..
Past-tense. Solid wording.
Yes, very correct.
The efficiency goes to 30 MPH in this car.
they're both correct depending on if your talking in past tense or present
Yes, that wording is correct. An example of a sentence that uses this wording is "I am not looking forward to washing the car."
That will be correct so long as you finish the sentence and say when or where it was built. Otherwise, it is just part of a sentence.