thì

Etymology 1
..

Noun

 * 1) the prime time in terms of physical development
 * 2)  a tense
 * 1) the prime time in terms of physical development
 * 2)  a tense
 * 1)  a tense

Etymology 2
Most likely from etymology 1.

Particle

 * 1)  as for ..., it is/does/will ...
 * 2)  in that case, then ...; well, then ...
 * 1)  in that case, then ...; well, then ...
 * 1)  in that case, then ...; well, then ...
 * 1)  in that case, then ...; well, then ...
 * 1)  in that case, then ...; well, then ...
 * 1)  in that case, then ...; well, then ...
 * 1)  in that case, then ...; well, then ...

Usage notes

 * Used quite similarly to the Japanese topic particle to mark the topic of a sentence. However, unlike the Japanese counterpart, it doesn't need to accompany words for time or place to specify contrast; in those cases, such words may be simply treated as adverbials like their English equivalents. For example:
 * Can accompany and be translated as "then". In that case, the whole preceding "nếu-clause" functions like a noun.
 * Can accompany and be translated as "then". In that case, the whole preceding "nếu-clause" functions like a noun.