to clam up
01
突然沉默, 拒绝说话
to suddenly become silent or refuse to talk, often because of nervousness, fear, or a desire to keep information secret
语法信息
形态构成
短语
动作动词
规则
不可分离
小品词
up
基本动词
clam
现在时
clam up
第三人称单数
clams up
现在分词
clamming up
一般过去时
clammed up
过去分词
clammed up
例子
Every time the teacher asked him about his weekend, he would clam up and avoid eye contact.
每次老师问他周末过得怎么样时，他都会突然沉默并避免眼神接触。
