when it comes to ...; speaking of ...; if we're talking about ...
Used to introduce a topic or to respond to a previous statement by focusing on a specific aspect. Often follows a noun or a phrase.
When it comes to Japanese food, many people think of sushi.
"He's excellent." "Speaking of excellent, his sister is amazing too."
you mean ...?; so that means ...; by ... you mean ...
Used to seek clarification or to confirm the meaning of what was just said. Can appear at the beginning of a sentence.
"Tomorrow is a day off." "You mean we don't have work?"
So that means he's not coming?
whenever ...; if it's ... then (without fail)
Indicates that whenever a certain condition is met, a particular result inevitably follows. Often used with habitual or characteristic outcomes.
Whenever he has free time, he immediately starts playing games.
Whenever this shop releases a new product, long lines form.