Check my sentences with the subjunctive mood

[hirashin]

Would these sentences sound right?
a) If it were not for your advice, he would not be successful now.
b) If it were not for your help, we could not communicate with him.

Thanks in advance.
Hirashin　

 

[OoTmaster]

They both sound right to me.

 

[WonkoTheSane]

They sound good to me.

 

[hirashin]

Thanks, OoTmaster and Wonko.