It seems fine but is a bit vague, I would use either "We are expecting good news today", or "we received good news today". either of those will let the reader know more.
Good news came today.
"Its gonna be a good sleep for me tonight" is not correct grammar; instead, it should be "It's going to be a good sleep for me tonight".
yes, it is very good grammar.
Grammar is tricky. If you did not learn it as a child, the best way to learn it (and know whether your grammar is correct) is to find someone who speaks correct grammar and listen to them, a lot. NPR is a good place to listen to people who have good grammar.
The correct grammar for the sentence is: "It's going to be good for me tonight." In this corrected sentence, "It's" is the contraction for "It is," and the word "good" should be used instead of "a good."
This candle IS
"Did you have a chance to speak with him?" is a perfectly good and correct sentence. It does not contain any grammar mistakes.
She plays very well is the correct way to say it.
"You were looking good" is the correct grammar. "You" is a second person pronoun that always takes the verb form "were" in past tense, regardless of the situation. "Was" is used with singular subjects, whereas "were" is used with plural subjects.
This is an example of casual, colloquial speech. To make it completely correct you would need to fill in the words that are left out: It's a good thing that I have this cracker."
no. Replace "good" with "well". "You washed the car well."
Yes it is. The sentence "This will be an exciting month for me" is absolutely correct (it needs a period at the end, of course). But "a correct grammar" is not-- you want to ask whether it is "grammatically correct," or to be simpler, ask whether it is "good English."