The sentence "John would help us if he were here" is a conditional sentence. Let's identify which type it is.
Conditional sentences are classified into types based on the tense and structure of the clauses involved. We have:
Type 0: General truths or habits (If + present simple, present simple).
Type 1: Possible or probable future events (If + present simple, will + base form).
Type 2: Hypothetical or unlikely situations in the present or future (If + past simple, would + base form).
Type 3: Hypothetical situations in the past (If + past perfect, would have + past participle).
In the given sentence, "John would help us if he were here," the structure is:
`if + past simple (were), would + base form (would help)`
Therefore, this matches the structure of Type 2 conditional sentences.
**Answer:** Type II