@tanguatlay,
tanguatlay wrote:
1. It's only you who is/are confused.
2. It is I who is/are leading this project.
Should I use 'is' or 'are'?
Many thanks.
THis is what I was taught, but I expect that some people will jump in to disagree:
1. "Who" is the subject of that verb and "who", in this case, refers to "you", so we want the verb that agrees with you-- are. You wouldn't say or write "You is leading the project".
2. Either of these is acceptable
It is I who leads the project
It is I who am leading the project
The second of these is perhaps a little formal.
To me, neither "I who is leading" or "I who are leading" is acceptable. You would neither say "I is leading" or "I are leading". However others may (and probably will) contradict me...