until Wait until four o'clock. 等到四點鐘。 It was not until yesterday that I learned it. 到昨天我才知道。 1.直到…為止;到(…的時候)。 2.在…以前;不到…(不)〔用在否定句中〕。 Wait here until I come. 在這兒一直等到我來。 He didn't come back until the sun had set. 他直到太陽落山以后才回來。 ★ till 與 until 同義,但在主句之前的從句或短語中,通常用 until: Until he returns, nothing can be done. 他不回來什么也不能做。 unless and until =until.