回复：Thank you for your suggestion!

加拿大大学Phd容易申请吗？有没有奖学金？
You can apply. If he is good, Should n't have any problem. A lot of Canadian Profs came from England or they have England root. So they may like a student from England. One thing should be pointed. Research level of Canadian Univ may not be as high as that of US Univ. Don't be up set about this.

有没有奖学金？
Yes. But not as easy as in USA. Any way try it. Nothing loss.

如果曾被美国拒签，是否会对去加拿大签证有影响
Nop, Canada is a different country.

Good luck