There are a few different ways to use the word "for" in English, and it can be a little confusing to know when to use each one. Here is a quick guide to using "for" correctly.

"For" can be used as a preposition, which means it goes before a noun or pronoun. When used as a preposition, it usually has the meaning of "because of," "in exchange for," or "in order to." For example:

• I'm doing this for you. (Because of you)
• I'll trade you my sandwich for your chips. (In exchange for)
• I need to go to the store for milk. (In order to)

"For" can also be used as a conjunction, which means it connects two clauses or phrases. When used as a conjunction, it usually has the meaning of "since," "because," or "in order to." 

For example:

1. I'm doing this because I want to help you.
2. I need to go to the store in order to get milk.

Finally, "for" can be used as an adverb, which means it modifies a verb. When used as an adverb, it usually has the meaning of "during" or "in order to." For example:

• I'm studying for my test. (During)
• I need to go to the store for milk. (In order to)
• So, when should you use each form of "for"?

If you want to say "because of," "in exchange for," or "in order to," then you should use "for" as a preposition.

If you want to say "since," "because," or "in order to," then you should use "for" as a conjunction.

If you want to say "during" or "in order to," then you should use "for" as an adverb.

1. The postman is coming for the mail.
2. The flowers are blooming for the bees.
3. I am studying for the test.
4. She is dancing for joy.
5. We ran for the bus.
6. He kicked the ball for the goal.
7. It rained for two days straight.
8. I stayed for the party.

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