ThorW wrote...
Grammar is important, as without it we lack the necessary rules for sentence structure and proper syntax. Since grammar defines how a sentence is written, ie: Subject location, verb location, object location; and how to use the proper words it's necessary to be able to convey what you're trying to say clearly.
For example, a foreigner with improper grammar knowledge could change a sentence such as this:
"Excuse me, can you help me find my way to Third street?"
To this:
"Excuse, Third Street, where?"
Like that, asking for directions suddenly becomes harder because of poor grammar. And that's just something as simple as asking for directions, imagine if that same person was trying to explain something complicated.
As for what you were directly referring to though, small mistakes such as ain't, using then instead of than, a misplaced or missing comma, and should of instead of should have are all overlookable since the message is still able to be conveyed.
Grammar is important, but small mistakes and the occasional use of slang isn't something to obsess over. Only when your sentences become hard to understand or indecipherable do you need to improve your grammar.
i agree