use of adverbs and adjectives

1a. He speaks very well.
1b. He speaks very good.
2a. She spoke very loudly.
2b. She spoke very louder.
3a. He was there happily.
3b. He was there happy.
4a. He sees particularly me.
4b. He looks particularly me.
4c. He looks particular me.
Please correct all.
Thanks.

1a. He speaks very well.
1b. He speaks very good.
He speaks very good English/Urdu/Spanish/Itaian.
2a. She spoke very loudly.
2b. She spoke very louder.
3a. He was there happily.
3b. He was there happy.
He was happy to be there.
Happily, he was there. (not the same meaning as the one above)

4a. He sees particularly me.
4b. He looks particularly me.
4c. He looks particular me
.
He sees me in particular.
He particularly looks in my direction. (not the same meaning as the one above)

Hi Beees,
I did hear people say “Speak louder!”, which I consider acceptable English. How do you think?

‘Speak louder’ works perfectly well, as does ‘Could you speak louder?’, etc…
However, that wasn’t included in Allifathima’s list.

Beeesneees,
‘loud’ can behave like an adjective or an adverb.

  1. She spoke louder.
  2. She spoke loudly.
    Can we not assume ‘louder’ in #1 as an adverb?
    Thanks.

I have the same inquiry too. Loud can be an adverb ítself. But it seems that while ‘loud’ can be used with comparisons, ‘loudly’ can’t.

He speaks very loud
is not polished or well used, but it is acceptable. However, this is NOT what your sentence #1 says.