<p>I have been reading a lot of grammar material and these things always pop up. Sometimes when I do official tests I always go by strict English rules with subjunctives, especially those clauses that begin with "if". Most of the time it ends up being an overkill and the answer choice is just "no error."</p>
<p>I haven't seen a who/whom yet, but you'd never know when one would pop up. </p>
<p>Anyway, getting a score as high as possible is the goal for everybody, so it would be good to know.</p>
<p>By the way, any good tip on will/would, can/could? I know the general difference is just past tense and present tense. But sometimes could/would is used for present tense and I get confused.</p>