nice to hear/see

[aysaa]

Hi,

Question 1:

1. It is nice to hear Michael doing his homework.
2. It is nice to hear (that) Michael has done his homework.

Question 2:

3. It will be nice seeing you again.
4. It will be nice to see you again.

Which one/s is/are more proper to use?
Thanks.

[emsr2d2]

Hi,

Question 1:

1. It is nice to hear Michael doing his homework.
2. It is nice to hear (that) Michael has done his homework.

Question 2:

3. It will be nice seeing you again.
4. It will be nice to see you again.

Which one/s is/are more proper to use?
Thanks.

They are all fine. 1 and 2 don't mean the same thing at all. 3 and 4 mean the same thing.

[aysaa]

Thanks.

Can we say ''it is nice to hear Michael to do his homework'' instead of 'iIt is nice to hear Michael doing his homework''?

[Barb_D]

Thanks.

Can we say ''it is nice to hear Michael to do his homework'' instead of 'iIt is nice to hear Michael doing his homework''?

No, that's not grammatical.
In #1, you heard sounds, words, or noises of some sort that show he's doing his homework. Perhaps he is practicing for his speech class.
In #2, you have obtained information that the homework is now complete.

It's nice to hear that Michael is doing his homework. -- This might suggest that there was a period in the past when Michael was not doing his homework regularly, and now you have information that he is now routinely doing his homework.