Could you please refer me to a comprehensive article about usage of 'when' statements?

Question

I'm surprised by how it is hard to find something on the web, that would comprehensively describe every case of using 'when' statements. For instance, I've found that I can use statements like this:

• when (present simple), (present simple)
• when (past simple), (past simple)

I understand that I can say something like this:

I meet you when you arrive at the station.

But I'm also aware of continuous statements with 'when', but haven't found anything on it. For example:

When I'm doing homework, I always feel tired - is it correct? Or should I say "I'm always feeling tired" instead?

P. S.

I'd be the most grateful, if you provided me how 'when' statements are called. Cause I know that 'if' statements are called 'conditional'.

Answer 1

'I meet you when you arrive at the station.'

This is correct.

In this 1st example, 'I meet you' and 'you arrive at the station' are independent clauses. When they are joined by 'when', a subordinating conjunction, the clause 'when you arrive at the station' becomes a dependent clause.

'When I'm doing homework, I always feel tired.'

This 2nd example is similar and is correct. The dependent clause now appears first, hence we use a comma.

"I'm always feeling tired" is not as natural as the 2nd example.