Use of "Would" and "Could"

[Sajid]

hi, I am beginner ,

and this is my first post where i'm asking somthing ,,,can anyone explaine the use of would and could,,, many time i used them ,,,but always get confusion

thanks

[Mister Micawber]

.
Rather a large question, Sajid, but here are some of the uses:

Would

Polite request: Would you close the window, please?
Conditional II and III: If I saw you, I would greet you. If I had seen you, I would have greeted you.
Past habit: When I was young, I would play outside all day.

Could

Polite request: Could you close the window, please?
Polite offer: Could I get you something to drink?
Conditional II and III: If you asked, I could get you a drink. If you had asked, I could have gotten you a drink.
Past ability: When I was young, I could party all night.

Other members will likely come up with other uses of these popular modals.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber

[Sajid]

thank you, Mister Micawber