det 俩，双(the two; the one and the other )(接pl n)：～(sb's)parents/twins/hands/arms/shoulders/legs/feet/eyes/ears双亲/胞胎/手/臂/肩/腿/脚/眼/耳(都……);～(the) sides/(the) ends of the street街道的两边/两头(都……);～(sb's/the/these)children/books/armies(某人的/这/这)两个孩子/两本书/两支军队(都……);

pron 两者，双方(the two; the one and the other (of...))：She has two sons：～live on her farm.她有两个儿子，他们都住在她的农场。B～(of his parents/the children) are strong.他的父母/那两个孩子都很强壮。His parents/The children are～strong.他的父母/那两个孩子都很强壮。She is afraid of them～.他们两个人她都怕。I love Tom and Jack～.(AmE) 汤姆和杰克俩人我都喜欢。I asked～(of them) to come.我请(他们)俩人都来。get angry with～(of the children)生俩个(小孩)的气;

both...and...不但……而且……： B～her kindness and her understanding were much appreciated.她的善良和明事理都大受赞誉。The prospects～excited and worried me.前景既使我激动也使我不安。The dangers threaten～men and women. 这些危险既威胁着男人也威胁着女人。The storm stripped the tree of～its foliage and its branches.风暴把树叶和树枝都刮掉了。She was ashamed～for herself and for Jackson.她为自己感到羞愧，也为杰克逊感到羞愧。～at home and abroad 国内外都;She was～glad and sorry to see him.她见到他时悲喜交集。

【惯用法】 1) both 用于两者(且仅两者)，但两者皆可(或同时都)为复数，如：The storm damaged both the houses and the yachts. (风暴不仅毁坏了房屋，也毁坏了游艇。) 2) AmE中下面三种说法都对：both parents， both his parents， both of his parents;但BrE中，第三种较少用。第一、二种说法强调两者为一整体，第三种说法则是将两者视为单个个体分开来看。因此，两者互相依存或关联时，决不可用of，如：both ends/sides;3) 注意下面两句语义上的区别：Tom and Dick both bought a car. (俩人合买了一辆车) Tom and Dick each bought a car. (俩人各买了一辆车) 4) 有both的句中再用same，also，as well as，jointly，alike 和 equally之类强化词语是多余的，如：They both love the same girl. (应省去same或both) I both saw and also heard her. (应省去also) He's both rich as well as handsome. (应省去 both，或 as well as改为and)。

【辨异】both与all的区别见ALL。