倘若 (if / should — literary)

"If…" with if倘若tǎng ruò

• if倘若tǎng ruò … ，then / just就jiù … = "if / should …, then …" — a literary if如果rú guǒ.
• if倘若tǎng ruòto be defeated失败shī bài，also也yědon't不要bú yàoto lose heart灰心huī xīn = "should you fail, don't lose heart."
• if倘若tǎng ruò is the most bookish of the "if" words.

if倘若tǎng ruò … ，(then / just就jiù / also也yě) …

• if倘若tǎng ruò opens a formal supposition.

should倘若tǎng ruòhave有yǒudifficulty困难kùn nan，please请qǐngtell告诉gào sume我wǒ。

• if倘若tǎng ruòto have / there is有yǒudifficult困难kùn nán，to ask请qǐngto tell告诉gào sùI / me我wǒ = "should there be any difficulty, please tell me."

Recap

Read the full reference: HSK 6 grammar — Sentence patterns.