अगर हम अभी जाएँगे, तो हम जल्दी शहर पहुँचेंगे।

If we go now, then we will reach the city early.

Breakdown of अगर हम अभी जाएँगे, तो हम जल्दी शहर पहुँचेंगे।

• जाना: to go
• अभी: now
• हम: we
• अगर: if

Questions & Answers about अगर हम अभी जाएँगे, तो हम जल्दी शहर पहुँचेंगे।

What does अगर ... तो ... do in this sentence? Is तो required?

अगर ... तो ... is the Hindi pattern for if ... then ....

• अगर introduces the condition.
• तो introduces the result.

So the structure is literally if ..., then ....
तो is very common, but not always absolutely required. You may hear sentences without it, especially in speech, but using it makes the relationship between the two clauses clearer.

Why is जाएँगे used after अगर? Is that the most natural form?

This is a very common learner question, and it matters here.

In the sentence as written, जाएँगे is a future tense form: we will go. But in standard Hindi, after अगर in a real future condition, many speakers would more naturally say:

अगर हम अभी जाएँ, तो हम जल्दी शहर पहुँचेंगे।

Here जाएँ is a subjunctive-style form, which is very common in if clauses.

So:

• Given sentence: अगर हम अभी जाएँगे...
• More natural for most learners to copy: अगर हम अभी जाएँ...

Using future in both clauses can occur in some speech, but if you want safe, standard Hindi, अगर + जाएँ + future result is the better pattern.

Why is हम repeated twice? Can I leave the second one out?

Yes, you can often leave the second out.