Looking on the internet deeply has found these results:

I knew she had the potential is the most popular phrase on the web.

I knew she have the potential 10 results on the web	I knew she had the potential 1293 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.	I knew she had the potential when I saw the film "Sleeping Dictionary"; perhaps motherhood (she's a real mom now) has allowed her to find character depth we ... I knew she had the potential to be something special here.”. Mar 27, 2015 ... "I knew she had the potential," Davis said. "It seemed like early in the season in big games, she'd try too hard – especially early in the games. and knowing her limited training background Jun 21, 2015 ... At the time she was a good tennis player but I knew she had the potential to be much better. “At the time I'd just taken the program over and we ... Oct 24, 2015 ... ... and won the state in the 3,200

I knew she have the potential

10 results on the web

I knew she had the potential

1293 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.

I knew she had the potential when I saw the film "Sleeping Dictionary"; perhaps motherhood (she's a real mom now) has allowed her to find character depth we ...
I knew she had the potential to be something special here.”.
Mar 27, 2015 ... "I knew she had the potential," Davis said. "It seemed like early in the season in big games, she'd try too hard – especially early in the games.
and knowing her limited training background
Jun 21, 2015 ... At the time she was a good tennis player but I knew she had the potential to be much better. “At the time I'd just taken the program over and we ...
Oct 24, 2015 ... ... and won the state in the 3,200