1 . This is the first time I have ever been to Sapa

2 . I haven't seen him since 2010

3 . Big Ben is the most famous tower in England

4 . New York is more modern than London

I have never to sapa before ( ever)
This is the first time I have ever been to Sapa . 
The last time I saw him was in 2010 (seen)
I haven't seen him since 2010.
No other tower in england is as famous as Big ben(the)
Big ben is the most famous tower in England.
London is a lot older than New yorl ( modern)
New york is more modren than London .

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