b2utiful night

This is also some kind of form of negation but in this case it is more like saying I can't do something (even though I probably want to do it) instead of saying I won't do it.
And of course you get to choose between two types to form this form of negation

못 + verb (conjugated)

Examples:
못 먹어요 => I cannot eat
못 갈거예요 => I cannot go


verb stem + 지 못하다

Examples:
가지 못해요 => I can't go
먹지 못했어요 => I can't eat


Keep in mind that this is the best and most polite way to tell your boss or teacher that you won't be going to work or school instead of saying 안 가요~

So far we have learned how to state a fact on our sentences. Now we are going to see how we make an interrogative sentence and how we make negative sentences.


INTERROGATIVE SENTENCES

Fairly easy.. When it comes to POLITE and CASUAL form, we simply add the question mark at the end of the sentence.

Example:
먹어요 => I am eating
먹어요? => Are you eating?


Now for the FORMAL form all we have to do is
1) drop the -다 from the ㅂ니다/습니다
2) and add -까? in its place

Example:
갑니다 => I am going
갑니까? => Are you going?


NEGATIVE SENTENCES

There are 2 ways to form negative sentences. It's all a matter of which of the two ways seems more convenient to you~

안 + verb/adjective

You conjugate like you've learned so far and you simply add 안 in front.

Example:
안 먹어요 => I am not eating
안 갑니다 => I am not going


verb stem+ 지 않다

As the above pattern shows, you take the verb stem (remember how we get this, right?) and add 지. Then you conjugate 않다 depending on the tense you want to use.

Examples:
가지 않습니다 => I am not going
가지 않아요 => I am not going
가지 않았어요 => I didn't go
가지 않을 거예요  => I will not go
and so forth...~


NOTE:

For 이다 and 있다 the negative form is a completely another word.
So don't try and conjugate them ^_^

이다 => 아니다 (instead of 안이다)
있다 => 없다