be a two-timer
作表语，指某人是欺骗者或叛徒。
He was a two-timer, cheating on his wife with multiple women.
他是个骗子，背着妻子与多个女人有染。
对伴侣不忠的人；脚踏两条船的人
对他人不忠的人；不忠者。；na. 骗人[出卖人]的人；〈美俚〉叛徒
a person who is unfaithful to their romantic partner by having another relationship
对他人不忠的人；不忠者。
A person who two-times another.
She called him a two-timer after seeing his messages to another woman.
她看到他和另一个女人的短信后，骂他是个脚踏两条船的人。
用法提示：two-timer 是名词，指对伴侣不忠的人。
No one trusts a two-timer who keeps promising to change.
没人会相信一个一直承诺要改却脚踏两条船的人。
用法提示：two-timer 作名词，表示“脚踏两条船的人”。
When they found out he was a two-timer, his friends stopped talking to him.
当朋友们发现他是个对伴侣不忠的人时，都不再跟他说话了。
用法提示：two-timer 是名词，在句中作表语，指对伴侣不忠的人。
作表语，指某人是欺骗者或叛徒。
He was a two-timer, cheating on his wife with multiple women.
他是个骗子，背着妻子与多个女人有染。
作宾语补足语，指责某人是骗子。
She called him a two-timer after finding out about his affair.
发现他的婚外情后，她骂他是骗子。
用于指控某人欺骗。
The neighbor accused him of being a two-timer in his marriage.
邻居指责他在婚姻中不忠。
限定于关系语境，作主语。
A two-timer in a relationship often hurts both partners.
在一段关系中的欺骗者往往会伤害双方。
grammar · medium
易错句子He is a two-timer because he came late twice.
正确表达He is a two-timer because he betrayed his friend.
“two-timer”意为欺骗或背叛他人的人，而非重复做某事的人；应避免将词义误解为“重复做某事的人”。
grammar · medium
易错句子He is a two timer.
正确表达He is a two-timer.
“two-timer”是带连字符的复合名词，不能拆分为两个单词，需保持连字符以符合规范拼写。
two-timer 多指感情或私人关系中的背叛，较口语化；traitor 通常指政治或重大事务中的叛国者或背信者，语气更正式。
two-timer 特指在恋爱或承诺关系中欺骗对方的人；cheater 含义更广，可指考试作弊、比赛违规或任何欺骗行为。
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