backstroke (no object)
不及物动词，无需宾语。
She backstrokes every morning.
她每天早上仰泳。
仰泳；仰面游泳
backstroking — present participle of backstroke
反手击打；回手一击；用反手击打。；游仰泳。；还击
to swim on one's back, especially using the backstroke
用反手击打。
To hit with a backstroke.
游仰泳。
To swim the backstroke.
仰泳
swim on one's back
一般现在时
She backstrokes every morning.
她每天早上游仰泳。
一般过去时
He backstroked across the pool yesterday.
他昨天游仰泳横渡了游泳池。
现在进行时
They are backstroking in the lake right now.
他们现在正在湖里游仰泳。
规则动词：backstroke（仰泳）
He backstroked across the pool effortlessly.
他毫不费力地仰泳游过了游泳池。
用法提示：此处 'backstroked' 为过去式，表示仰泳动作。
She backstrokes every morning for exercise.
她每天早晨仰泳锻炼身体。
用法提示：此处 'backstrokes' 为第三人称单数，表示仰泳。
They were backstroking in the lake when it started raining.
他们在湖里仰泳时，天开始下雨了。
用法提示：此处 'backstroking' 为现在分词，表示正在进行的仰泳动作。
不及物动词，无需宾语。
She backstrokes every morning.
她每天早上仰泳。
表示方向，常接' across' 或' through'。
They backstroked across the lake.
他们仰泳穿过湖面。
表示距离或时间，用介词' for'。
He backstroked for 50 meters.
他仰泳了50米。
grammar · medium
易错句子He does backstroke every morning.
正确表达He backstrokes every morning.
backstroke 是动词，不需要与 do 连用；中文母语者常将英语中的动词误用为名词短语。
grammar · medium
易错句子She backstroked the pool.
正确表达She backstroked across the pool.
backstroke 是不及物动词，不能直接接宾语，需加介词短语表示位置或方向。
背泳是仰卧在水面，蛙泳是胸部朝下、腿部做蛙式蹬夹。
蝶泳双臂同时向前划水，背泳双臂交替划水。
自由泳通常指爬泳，面朝下；背泳则面朝上。
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