a) I haven't introduced them to you because I dreaded them turning out to be time-wasters.
b) I haven't introduced them to you because I dreaded them being timewasters.
I guess both are correct and practically conveys the same sense that I was concerned that some people might prove time-wasters. Or b) can look only so:
b.2) I haven't introduced them to you because I dreaded they were time-wasters.
?
However, I consider such modification, even if needed, doesn't change the sense even slightly compared with b.1, though I assume that someone may say that assumption about those people is more evident and strict here.
b) I haven't introduced them to you because I dreaded them being timewasters.
I guess both are correct and practically conveys the same sense that I was concerned that some people might prove time-wasters. Or b) can look only so:
b.2) I haven't introduced them to you because I dreaded they were time-wasters.
?
However, I consider such modification, even if needed, doesn't change the sense even slightly compared with b.1, though I assume that someone may say that assumption about those people is more evident and strict here.