"If you work hard, your exam score will (加倍)," the teacher said to Jim.
我过去常常害羞. (used to )
.
他可能是科学家. (may be)
昨天那则好消息使我们都高兴. (please)
知道如何有礼貌的邀请帮助是最重要的. (ask for)
My life has (变化)a lot in the last few years.