Thanks you the teachers all around the world.
Are they the same in meaning?
1. I am pretending to read.
2. I pretend to be reading.
3. You are seeming to work hard.
4. You seem to be working hard.
The difference with any sentence like this still remains the difference between the simple present and the present continuous (progressive) in each of the clauses. That is, you still have to choose the correct tense for each use.
3. is not a correct sentence.