Question

If he worked hard he......... (pass). ​

Answer 1

If he work hard he will be passed.

Answer 2

Answer:

If he worked hard, he would pass

Explanation:

Given question is

If he worked hare he ---------(pass)

The sentence is a conditional sentence and the word 'if' is used in conditional sentences.

There are five types of conditional sentences. They are

Zero type conditional sentences

Type I conditional sentences

Type II conditional sentences

Type III conditional sentences

Mixed Type conditional sentences

The given sentence is a Type 2 conditional sentence

In type II conditional sentences are used to represent unreal or imaginary situations.

In Type II conditional sentences, simple past is used in the 'if' clause and  would/should/could/might + base verb in the main clause

Here, the simple past tense of the verb 'worked' is used in the 'if' clause.

Then the verb in the main clause will be 'would pass'

Hence, the correct answer is

If he worked hard, he would pass