Definition

1. Conjunction / Adverbial Phrase:
   • If so / If that is the case: Used to introduce a conditional statement or question based on a situation, fact, or possibility that has just been mentioned or implied in the conversation.

Usage Examples

• Conjunction / Adverbial Phrase: (You don't like this project? If so, we should discuss it again.) (She will probably be late. If that is the case, let's just start without her.) ("I don't have enough money." – "If that is the case, then we need to find another solution.")

Advanced Usage

• Often used at the beginning of a clause, typically followed by "thì" (then) for emphasis and flow, forming the common structure "Nếu thế thì..." (If that is the case, then...). (Have you finished your homework? If so, then you can go out.)

Variants and Related Words

• Nếu vậy: A very close synonym, also meaning "if so / if that is the case." The usage is nearly identical. (It's about to rain. If that's the case, we should stay home.)

Synonyms

• If so: Used to refer to a possibility just mentioned.
• If that is the case: Used to acknowledge a stated situation as the basis for what follows.
• In that event: A more formal alternative.

Related Phrases and Idioms

• Nếu không thế / Nếu không phải thế: If not so / If that is not the case. (He must have a reason. If that is not the case, why would he be silent?)

1. If so, if that is the case
   • Nếu thế thì sao anh không bảo tôi trước?
     If so, why didn't you tell me beforehand?