1. This is all that I have now.
2. This is what I have now.
(Are both the same in meaning?)
3. Please show me that he is active.
4. Please show me the fact that he is active.
5. Please show me that this is correct.
(Are the three sentences grammatical?
1 and 2 are the same, yes.
3 and 5 are okay, but 4 would never be used.