use of 'as well as'

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. As well as singing well, I act in the drama.
  2. As well as I sing, I act in the drama.
  3. I sing as well as I act in drama.
  4. I sing as well as act in drama.
    Please check and correct.
2

  1. is okay.

  2. is incorrect

  3. The second ‘I’ is dropped and assumed, as in 4.

3

Beeesneees,

  1. She sings as well as writing plays.
  2. She sings as well as writes play.
    are they correct?
4

Yes, though the first sounds a little more awekward, so the second would be a better phrase to use.

Strictly the first should be something like:
She engages in singing, as well as writing plays.