Looking on the internet deeply has found these results:

I knew you since kindergarten. is the most popular phrase on the web.

I've knew you since kindergarten. 10 results on the web	I knew you since kindergarten. 16 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	smiley_pancake22 Meh 8h. oscar_sk8s Tbh u seem cool 3h. briyanna_flips247 Tbh I knew you since kindergarten 55min. jackelinq.gurrola Really on the picture ... Oct 2, 2002 ... I knew you since kindergarten. Every year I would look forward to your Halloween parties and Birthday parties in the summer. You were nice to ... jaren5 #bangahsunion 3mon. sabina.chang tbh justin ? i knew you since kindergarten but you dont talk to me lol youre funny and nice and chill haha 2mon. Sep 3, 2014 ... Moisa i knew you since kindergarten and i knew you had this beautiful talent inside you and I'm just happy that your letting the world see it.

I've knew you since kindergarten.

10 results on the web

I knew you since kindergarten.

16 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

smiley_pancake22 Meh 8h. oscar_sk8s Tbh u seem cool 3h. briyanna_flips247 Tbh I knew you since kindergarten 55min. jackelinq.gurrola Really on the picture ...
Oct 2, 2002 ... I knew you since kindergarten. Every year I would look forward to your Halloween parties and Birthday parties in the summer. You were nice to ...
jaren5 #bangahsunion 3mon. sabina.chang tbh justin ? i knew you since kindergarten but you dont talk to me lol youre funny and nice and chill haha 2mon.
Sep 3, 2014 ... Moisa i knew you since kindergarten and i knew you had this beautiful talent inside you and I'm just happy that your letting the world see it.