Complete the following sentences appropriately with either the main clause or the subordinate clause (if clause).
Your teacher will be unhappy if ____.
you do not complete your homework (or similar appropriate clause)
They would have caught the train if ____.
they had left home earlier (or similar appropriate clause)
____ if you continue to stay up late every night.
You will feel tired (or similar appropriate clause)
If she knew the answer, ____.
she would tell us (or similar appropriate clause)
____ if she had studied harder.
She would have passed the exam (or similar appropriate clause)
If I had a million rupees, ____.
I would travel the world (or similar appropriate clause)
Explanation
(1) This requires a subordinate clause (if clause) in present tense to match the main clause with 'will'. Example: 'if you do not complete your homework' or 'if you arrive late to class'. (2) This requires a subordinate clause in past perfect tense to match the main clause with 'would have'. Example: 'if they had left home earlier' or 'if they had not missed the bus'. (3) This requires a main clause with 'will' to match the if clause in present tense. Example: 'You will feel tired' or 'Your health will suffer'. (4) This requires a main clause with 'would' to match the if clause in past simple (second conditional). Example: 'she would tell us' or 'she would have raised her hand'. (5) This requires a main clause with 'would have' to match the if clause in past perfect (third conditional). Example: 'She would have passed the exam' or 'She would have scored better marks'. (6) This requires a main clause with 'would' to match the if clause in past simple (second conditional). Example: 'I would travel the world' or 'I would donate to charity'.