Sagot :
When I was a child I would have a bath every Sunday evening. - Correct!
In this sentence would has the meaning of used to.
When I was a child I would have a lot of wonderful toys. - Incorrect!
We saw in the previous sentence that would often has the meaning of used to. However, it cannot be used in this way with the verb to have when have means to possess. It must be: When I was a child I had (or used to have) a lot of wonderful toys.
I asked him to stop, but he wouldn't. - Correct!
Here would (not) means refused - He refused to stop.
When I was a child I would clean my room but I hated washing the dishes. - Correct!
Here would means was willing to.
I would clean my room yesterday. - Incorrect!
In the previous sentence would clean my room referred to a general willingness in the past to do something. However, would cannot be used in this way when referring to a single event in the past, so I would clean my room yesterday is not possible! It has to be: I was willing to (or didn't refuse to) clean my room yesterday.
I wouldn't clean my room yesterday. - Correct!
Just to make matters more confusing, it IS permissible to use would when referring to a single past unwillingness. Another example: He begged and begged, but I wouldn't tell him my secret.
If I were you, I would be careful what I said! - Correct!
Would is very common in conditional 2 sentences (but see below!)
If I would be rich, I'd buy a new house. - Incorrect!
It is not standard English to use would in the if clause of a conditional sentence. You have to say If I were (was) rich ..
You would tell him about the present - I wanted to keep it a surprise! - Correct!
In this sentence would has the function of expressing annoyance. It can be paraphrased: Why did you (have to) tell him about the present ..?
Would that I were rich! - Correct!
This sentence means: I wish that I were rich!