If the whole sentence was part of quotes the closing quote is an extended sentence. The whole sentence ends with quotes just after the beginning of the sentence. What’s

your opinion about a black SUV, he said, “the Car is pretty.” ”

However, in this case, it’s only the last word in the quotes, so the correct form as far as I’m concerned is

He said that the car was “pretty”.

I know that the person asked me for the proof but I’m misunderstanding single quotes and double quotes. Can any one explain the reason and I should use English

at all?