What do you do if there is a subjunctive trigger that is followed by the imperfect tense?
There is in fact an imperfect subjunctive, however it is rarely used and can only normally be found in technical pieces of literature or criticism. As a result, the present subjunctive is what would be needed here.
ZL
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I'm finding learning vocabulary boring and difficult, can you suggest any ways to do it?
Translate the following sentence into French: I want you to come on time so that we may start before he arrives.