不愧是 (truly worthy of)

Living up to the title

• to be worthy of不愧bù kuìto be / is是shì (不愧为bù kuì wèi) + Noun = "truly deserves to be / live up to the name of".
• he / him他tāto be worthy of不愧bù kuìto be / is是shìexpert专家zhuān jiā = "he's a real expert (lives up to it)."
• to be worthy of不愧bù kuì praises someone for matching their reputation.

to be worthy of不愧bù kuìto be / is是shì (不愧为bù kuì wèi) + Noun

• to be worthy of不愧bù kuìto be / is是shì confirms someone genuinely earns the label.

he他tātruly worthy不愧bú kuìis是shìexpert专家zhuān jiā。

• to be worthy of不愧bù kuìto be / is是shìexpert专家zhuān jiā = "(he's) a real expert."

Recap

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