suggested

Use the ing-form.

CB

Would he has suggested work. When to use the 'he has suggested or he suggested'. Would please explain?

AnonymousWould he has suggested work.

Wrong. Would + has is impossible.

He has suggested it several times. (perfect tense)
He suggested it yesterday. (past tense)

It is impossible to explain the use of English tenses on a forum like this. It would take too much time. Google "English tenses" for more info

Thank you. I will make sure to google that.
would it be correct to say:
He has suggested I ask you for additional papers vs He suggested .......

I am thinking that both are possible, since the examples could be seen as present perfect and simple past. Am I correct? Or is there a preference?

AnonymousWould it be correct to say:He has suggested I ask you for ...

Yes. Both "He has suggested" and "He suggested" are correct. If you mention a specific time when this happened, use only "He suggested". (Last week he suggested that I ask ..., but NOT Last week he has suggested that ....)

Great. That's what I thought.

So if I don't mention a specific time when this happened, is the correct one only he has or is there a preference?

Thanks.

Anonymousif I don't mention a specific time when this happened

In that case you can use either one and your sentence will be grammatically correct.

Nevertheless, other factors in the context should be considered. For example, sometimes the context implies that an event happened at a certain time even though the exact time isn't mentioned explicitly.

Got it. I really appreciate your detailed explanation, made things clearer to me