do A and B alternately
They alternately sing and dance.
他们交替唱歌和跳舞。
交替地；轮流地
按更比；用更比法；相互交替地；轮流地；按交替顺序。；以交替的顺序或位置；通过交替；在比例中,前项与前项相比,后项与后项相比。
in turns; first one thing and then the other, repeating
相互交替地；轮流地；按交替顺序。
In reciprocal succession; succeeding by turns; in alternate order.
以交替的顺序或位置
in an alternating sequence or position
通过交替；在比例中,前项与前项相比,后项与后项相比。
By alternation; when, in a proportion, the antecedent term is compared with antecedent, and consequent.
The traffic lights flashed red and green alternately.
交通灯交替地闪烁红色和绿色。
用法提示：副词修饰动词flashed，表示两种颜色交替出现。
AI contextual example
We took turns alternately carrying the heavy box.
我们交替地轮流搬运那个重箱子。
用法提示：副词修饰动词carrying，强调动作的交替进行。
AI contextual example
The weather was alternately sunny and rainy during our trip.
旅行期间天气交替地放晴和下雨。
用法提示：副词修饰系表结构was sunny and rainy，表示天气状态的交替变化。
AI contextual example
They alternately sing and dance.
他们交替唱歌和跳舞。
The flag is alternately red and white.
这面旗帜红白相间。
与 alternately 最接近，常形容两种状态或动作来回交替；可互换。
侧重按顺序逐个发生，不一定成对来回交替；且还有“反过来”等引申义。
强调按固定周期在多个对象间轮换，通常不限于两个。
只表示先后连续发生，不强调 A、B 反复交替的规律。
grammar · medium
易错句子You can come on Monday or alternately on Wednesday.
正确表达You can come on Monday or alternatively on Wednesday.
“Alternately”意为“交替地，轮流地”，而这里表示“或者，另选”，应使用“alternatively”。
grammar · medium
易错句子We have alternately shifts.
正确表达We have alternate shifts.
“Alternately”是副词，不能直接修饰名词“shifts”。应用形容词“alternate”来修饰名词。
针对“交替地、轮流地”这一义项，反义词为“同时地/一起”；注意“consecutively（连续地）”表示不间断地接连发生，并非直接反义。
针对“交替地、轮流地”这一义项，反义词为“同时地/一起”；注意“consecutively（连续地）”表示不间断地接连发生，并非直接反义。
作为选择，而不是交替
忽冷忽热
The weather has been alternately hot and cold this month.
这个月天气一直忽冷忽热。
一会儿笑一会儿哭
The baby alternately laughed and cried throughout the night.
宝宝整晚一会儿笑一会儿哭。
交替升降
His mood alternately rises and falls when he is under stress.
他压力大时情绪忽高忽低。
时干时湿；干湿交替
The climate here is alternately wet and dry, making farming difficult.
这里的气候干湿交替，使得耕作很困难。
-ately
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altern- (交替；其他) + -ate (形容词/动词后缀) + -ly (副词后缀)；同根词：alternate, alternative, alternation；同后缀词：quickly, slowly
交替发生的事件构成一种有先后顺序的序列。
交替过程往往形成循环往复的周期。
alternately 常描述两个或多个事物之间的交替关系。
交替意味着在状态或选项之间来回切换。
与 by turns 同义概念，表示按次序交替进行。
Dictionary facts from ECDICT, WIKTIONARY.