Use of from

AnonymousIs from used correctly in this sentence:Is that what you understood 'from' what I wrote?

Yes.

AnonymousWould 'by or with' be possible as well

'By' is a good alternative; 'with' is not.

Thank you.

Also, would it be correct to use 'this' instead of 'that'?

Anonymous would it be correct to use 'this' instead of 'that'?

It depends on where the understanding is displayed.

Got it. Thanks. I have two more questions.

1. would it have been correct if I had said: would it be possible if I had used this instead of that.
- is the entire above sentence written correctly, specifically how I used (would, have been, had)?
- is 'had' necessary in each of them?

2. is both use and used possible in this sentence: would it be correct if I 'use or used'.

Your descriptions are confusing. Please just list the sentences you want checked.

The sentences I want checked are numbered and the dashes are specific questions about them.
1. would it have been correct if I had said.
2. would it be possible if I had used this instead of that.
- is the entire above sentence written correctly, specifically how I used (would, have been, had)?
- is 'had' necessary in each of them?
3. would it be correct if I 'use or used'.

Anonymous1. would it have been correct if I had said.2. would it be possible if I had used this instead of that.

Those are OK if you capitalize and punctuate properly. Yo do not need 'had'.

Anonymousare both use and used possible?

Yes.

Anonymous4. Are or is both possible?

Where? What doe

Thanks. Sometimes it is really difficult to tell you what I exactly want in English.

I was asking about the use of had when I am referring to a past event. Is the use of had in the the sentences that you said I don't need them simply wrong, or not necessary?

I was simply referring to a past event and that is why I used had: would it have been correct if I said (or had said) in my

AnonymousI was asking about the use of had when I am referring to a past event. Is the use of had in the the sentences that you said I don't need them simply wrong, or not necessary?

It is unnecessary if the order of past events is evident or logically clear with simple past; it is also used occasionally for emphasis.

In future, place all example sent

Thanks for the advice.

So is this sentence correct in the simple past: 'would it have been correct if I said (and not 'had said') in my earlier post this answer instead of that?'

Also, would you tell me when would the use of had be mandatory?