prefer
I ´d prefer you to help me . I know this is correct

But what about

I always prefer you help / to help me ?

Is the use of " would " mandatory for the use of the following "to infinitive or not?

Thank you

Question

prefer
I ´d prefer you to help me .  I know this is correct

But what about

I always prefer you help / to help me  ?

Is the use of " would " mandatory for the use of the following "to infinitive or not?

Thank you

Answer

In both cases you can remove the word "to".

I'd prefer "that" you help me.
I always prefer "that" you help me.

But both sentences are improved by adding "that"