It's incorrect. In this sentence "Test" is the object. Therefore it must be put into the accusative.
The correct sentence should be:" Der Lehrer verbessert den Text".
The sentence is gramatically correct.
No 'It's for you' would be though
It is nearly correct. It would be "In dem (diesem) Haus tanzt Friederich." (engl. "Friederich is dancing in this house.")
No because and is a fanboy and it would not be gramatically correct
It's a weird sentence, but it is grammatically correct.
Yes, but it depends on which context it's used in.
my big fat mama
That's not even a complete sentence. The words TO, SAT, THIS, PEOPLE and IS can not be combined in any way to make a grammatically correct sentence. ------------------------------------------------------------------------------------------------------------- Assuming the question should be Is it gramatically correct to say, "This people is..."? then it is not correct. One should say, "These people are...".
You take the word, and put it in a gramatically correct sentence. :) *HEY NATALIE ;) FROM: BANANA*
That sentence is grammatically correct.
No. That phrase doesn't have a verb.
I don't see why not although beginning a sentence with 'or' is unusual.