i am confused usage of following words should, would, could. please provide simple and easy way explantion.?

You better then use this one :-

Considering the consideration, I have considered your consideration for approval.

should – to know it’s your duty or you are obliged to do a certain thing.

“I should be pleased my mother-in-law is visiting us.”

“I should be on time for work.”

would – to express a desire or intention to do something.

“I wish you would stay with me.”

“She said she would help me.”

could – to say you have the ability to do something.

“I could do that job for you.”

This does not mean I will do the job for you. It means I have the ability to do it.

I hope this helps.

There are more meanings to these words but these are the most common.

should – means something that has to be done – “you should do your homework.” Also means something that is likely to happen, such as, “they should be here soon.”

would – means a desire or something that is meant to happen “that would be john knocking on the door.” also means an action repeated in the past, “we would walk on the beach every morning.”

could – means “possibility”, or “able to.” something that can be done, such as, “you could do your homework,” or, “you could’ve done your homework.”

hope that helps.

Not sure really however you can look up this article I found on the net about them.

See if this helps to answer your question.