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Now, I'm very tired about the english grammar. because would....
i'm studying grammar about would But it is really difficult to me. how is difficult... I have read
many times grammar book, dictionary and some lessons from internet But I dont understand
exactly.. It is still cant understand. Some grammars are that I have already been understood. just like this..

I would like - this is polite way to say " I want "

ex)I would like some coffee
I would like to know about english more.

Would you? - this is polite way to say to requests

ex) Would you open the door please?

Would you like to? - this is polite way to say to offers

ex) Would you like some coffee?
Would you like to see movie with me?

These is all that i have been understood. But some forms(many forms) are still difficult to me.
I know would is used in various sitautions. But How could i know that situations? I cant definitely tell and write any sentences with any certainly about Would.
Please help me about that. I would like to know How is would used in What situations.
or tell me some easy and good lessons about grammar Would That I can see from internet.

Thank you sir
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You're right that "would" is complicated.

Your examples of polite usage are correct. Sadly there are no easy rules, so your question is too general to be answered in a forum like this. You need a good textbook.

I will tell you one thing: "Would" is the past tense form of "will".

But as you already know, that's not its only use.

John.
Comments  
Thank you sir.
I will read my grammar books and lessons from internet continually. I think i will understand that If i will read english sentences and grammar books often. thank you sir for your help!