am的过去式was；
wasbe的第一和第三人称单数过去式；
ambe 的第一人称单数现在式；口语中常略作’m
Inflation was so high that the notes were like Monopoly money.
通货膨胀严重，货币变得跟“大富翁”游戏钞票无异。
She was still half asleep when she arrived at work.
她到了上班地点时仍然睡眼惺忪。
His life was drawing to a close.
他的生命正走向终点。
