This is a site to help you collocations and syntax. Just type in the beginning of the sentence and it will offer you options for the next word in the sentence.
If you are new to The Tongue Untied, this site offers instruction in basic grammar, sentence structure and word choice, as well as rules for punctuation.
Funny short film where SS officer comes down hard on double negatives, missing plural 's' and ending sentences with prepositions. Not for students though probably.