Alternates
v. 交替( alternate的第三人称单数 ); （使）交替, （使）轮换
🗣️ 情景例句
I must have see you somewhere before.
我一定在哪里见过你。
I try to be punctual in getting dinner on the table.
我一向设法让晚餐菜肴准时上餐桌。
Mary is still writing letters. She's been writing letters all day.
马力还在写信，她写了一整天的信。