Meaning of guài bu de:
guài bu de
怪不得
Interjection
no wonder!; so that's why!
Tā jīntiān zǎoshang qǐ wǎn le, guài bu de shàngbān chídào.
他今天早上起晚了，怪不得上班迟到。
He got up late this morning, no wonder he was late for work.
Tā méi lái shàngbān, yuánlái tā shēngbìng le, guài bu de.
他没来上班，原来他生病了，怪不得。
He didn't come to work because he was sick, so that's why!
