Premodification
[计] 预先修改
🗣️ 情景例句
At four o'clock,
四点钟，
He has a very bad stomachache from eating too much.
他因为吃得太多而导致胃痛。
While the men had been working inside the ship, the air-line had been giving off oxygen.
当工人们的在船舱里干活时，供气管一直在排放氧气。