CONDITIONAL SENTENCES

If clause + main clause

• ZERO

If/When + present,.../present

• FIRST

If/Unless + present,.../future (imperative or modal)

• SECOND

If + past simple,.../would (could or might) + infinitive

• THIRD

If + past perfect,.../would have (could have or might have) + past participle (-ed or 3rd column)

• I WISH/IF ONLY + SIMPLE PAST → wish/desire
• I WISH/IF ONLY + WOULD → complaint
• I WISH/IF ONLY + PAST PERFECT → regret