Some "seem" and "appear" questions

Can the sentences 1 and 2 below be said as the sentence 3 below?

1) It seems (like) / appears that he is going to tell her the truth.

2) It seems (like) / appears that he will tell her the truth.

3) He seems (like) / appears to be going to tell her the truth.

And can the sentence 4 below be said as the sentences 5 and 6 below?

4) This is what he seems (like) / appear to be doing right now.

5) This is what it seems (like) / appear he is doing right now.

6) This is what it seems (like) / appear that he is doing right now.