Question

You will catch the train if you ..........earlier
A left
B . leaves
C . leave
D would leave

Answer 1

If you catch the train earlier if you leave earlier
hope it helps ☺☺

Answer 2

You will catch the train if you (leave) earlier.

• This is an imperative type of sentence.

Reason for not choosing the other options.

1. You will catch the train if you (left) earlier, the sentence here is if he\she leaves early, then he can catch the train, left is past tense so we cannot use this kind of this sentence.
2. You will catch the train if you (leaves) earlier, the sentence here is if he\she leaves early, then he can catch the train, leaves is a noun but we have put the verb in the sentence.
3. You will catch the train if you (would leave) earlier, the sentence here is if he\she leaves early, then he can catch the train, would leave represents that expressing a conditional mood in various senses.