一、從所接賓語(yǔ)來(lái)看
dress 要接“人”作賓語(yǔ)(不接“衣”作賓語(yǔ)),而其余的則要接“衣”作賓語(yǔ)(而不接“人”作賓語(yǔ)).
She dressed the baby. 她給嬰兒穿衣服.
She was wearing her mother’s coat. 她穿她母親的大衣.
Put your coat on when you go out. 出去時(shí)穿上外套.
She has a red jacket on. 她穿著一件紅色的短上衣.
二、從表示動(dòng)作與狀態(tài)來(lái)看
wear 和 have on 通常指穿著衣服的狀態(tài),put on 通常指穿衣的動(dòng)作,而 dress 既可指動(dòng)作也可以指狀態(tài).如：
She wore [had on] a new dress. 她穿著一件新衣服.
Put on your clothes quickly. 趕快穿上衣服.
She is dressing herself. 她在穿衣服.
She always dresses in black. 她總是穿黑衣服.
注：dress 還通常用于被動(dòng)語(yǔ)態(tài).如：
The girl was poorly dressed. 這女孩衣著寒酸.
He was dressed as a woman. 他男扮女裝.
三、從所使用的時(shí)態(tài)和語(yǔ)態(tài)來(lái)看
wear 和 have on 雖然都可表示穿衣的狀態(tài),但 wear 可用于進(jìn)行時(shí)態(tài)和被動(dòng)語(yǔ)態(tài),而 have on 卻既不可用于進(jìn)行時(shí)態(tài)也不可用于被動(dòng)語(yǔ)態(tài).如：
He was wearing a new jacket. 他當(dāng)時(shí)穿著一件新夾克.
Such clothes are not often worn nowadays. 現(xiàn)在那樣的衣服很少有人穿了.
四、其他用法上的區(qū)別
wear 除可表示穿衣外,還可表示戴表(花、紀(jì)念章等)以及留頭發(fā)或胡須等,而 dress, put on 一般不這樣用.如：
He seldom wears a watch. 他很少戴表.
He wears his hair long. 他留著長(zhǎng)發(fā).
注：have on 有時(shí)也這樣用.如：
They all had dark glasses on.