fall/be (madly/deeply/hopelessly) in love (with sb) （疯狂地／深深地／无可救药地）爱上／爱着（某人）
be/believe in/fall in love at first sight 是／相信一见钟情；一见钟情
be/find true love/the love of your life 是／找到真爱／一生的爱
suffer (from) (the pains/pangs of) unrequited love 受单相思之苦
have/feel/show/express great/deep/genuine affection for sb/sth 对某人／某事有着／表示出强烈的／深深的／真挚的爱慕之情
meet/marry your husband/wife/partner/fiancé/fiancée/boyfriend/girlfriend 与丈夫／妻子／伴侣／未婚夫／未婚妻／男朋友／女朋友结识／结婚
have/go on a (blind) date 有个／去约会／相亲
be going out with/ (especially NAmE) dating a guy/girl/boy/man/woman 与一个小伙子／女生／男生／男人／女人在谈恋爱
move in with/live with your boyfriend/girlfriend/partner 与男朋友／女朋友／伴侣同居

Weddings 婚礼

get/be engaged/married/divorced 订婚；结婚；离婚
arrange/plan a wedding 安排婚礼
have a big wedding/a honeymoon/a happy marriage 举行隆重的婚礼；度蜜月；婚姻幸福
have/enter into an arranged marriage 有一个／走入包办婚姻
call off/cancel/postpone your wedding 取消／推迟婚礼
invite sb to/go to/attend a wedding/a wedding ceremony/a wedding reception 邀请某人出席／参加婚礼／结婚典礼／结婚喜宴
conduct/perform a wedding ceremony 举行结婚典礼
exchange rings/wedding vows/marriage vows 交换戒指；互致结婚誓言
congratulate/toast/raise a glass to the happy couple 祝贺这对幸福的新人；为这对幸福的伉俪干杯
be/go on honeymoon (with your wife/husband) （与妻子／丈夫）在／去度蜜月
celebrate your first (wedding) anniversary 庆祝第一个（结婚）纪念日

Separation and divorce 分居和离婚

be unfaithful to/ (informal) cheat on your husband/wife/partner/fiancé/fiancée/boyfriend/girlfriend 对丈夫／妻子／伴侣／未婚夫／未婚妻／男朋友／女朋友不忠
have an affair (with sb) （和某人）有暧昧关系
break off/end an engagement/a relationship 解除／终止婚约／恋爱关系
break up with/split up with/ (informal) dump your boyfriend/girlfriend 与男友／女友分手；甩掉男友／女友
separate from/be separated from/leave/divorce your husband/wife 和丈夫／妻子分居；离弃丈夫／妻子；与丈夫／妻子离婚
annul/dissolve a marriage 宣布婚姻无效；解除婚姻关系
apply for/ask for/go through/get a divorce 申请／要求／办理离婚；离婚
get/gain/be awarded/have/lose custody of the children 获得／被判予／拥有／失去对孩子的监护权
pay alimony/child support (to your ex-wife/husband) （向前妻／前夫）支付生活费／子女抚养费