副詞 on all fours:

1. on hands and knees

1. Forced to reveal the truth at last, Rochester takes Jane to the forbidden chamber on the third floor where Jane sees a hideous creature, crawling on all fours in her madness.
   羅切斯特最終被迫吐露真情，他把簡帶到三樓的那間禁室，簡看見一個丑陋可怕的女人，正瘋瘋癲癲地用四肢在地上爬行。
2. The baby was crawling about on all fours.
   嬰兒那時正在滿處爬。
3. The baby often crawls on all fours.
   嬰兒經常匍匐而行。
4. The drawing is on all fours with the scene at that moment.
   那幅畫和當時的景象完全一致。