Verb/Adj plain form + わけだ

[No wonder; That's why; It means that]

Connection: Verb/Adj plain form + わけだ

Usage: Used to express a logical conclusion or realization. The speaker understands the reason behind something and draws a natural conclusion.

Related patterns already in N3:

• わけがない (impossible)
• わけではない (it's not that...)
• わけにはいかない (can't just...)

Examples:

毎日3時間練習しているのか。上手なわけだ。(You practice 3 hours every day? No wonder you're good.)

彼は日本に10年住んでいた。日本語が上手なわけだ。(He lived in Japan for 10 years. No wonder his Japanese is good.)

つまり、私が悪いというわけですね。(So what you're saying is it's my fault, right?)