tenses 2

[MIA6]

1. I have never seen such a great performance. {It means this is the best}
But my question is: Does it mean I never SAW such a great performance before? (but now i see it)

2. This is the nicest boy that I have ever seen. Does it mean from the past to now, this is the nicest boy I meet?

3. What does “I haven’t eaten chicken” mean? It means I didn’t eat chicken before. (Actions which happened at some unknown time in the past.) Or I didn’t eat chicken before, and I am still not eating chicken now? (Actions which started in the past and are still continuing)

4. What does "I have now written a letter." mean? The problem is: What does "now" here mean? It means I just finished writing a letter?

Thanks for replies

[Tdol]

1 It could be that youi are seeing it now or that you have seen it recently.
2 Yes
3 It depends on the context- it could refer to the person's life, or the meal at the time of speaking.
4 Yes