tranquilizing + noun
tranquilizing 作定语时直接放在名词前，说明药物或作用具有使人平静、入睡的效果。
The nurse gave the patient a tranquilizing drug before surgery.
护士在手术前给病人用了一种镇静药。
镇静的；安神的
(药物)具有使人或动物平静或入睡的效果；镇静的
calming, sedative
(药物)具有使人或动物平静或入睡的效果；镇静的
Of a drug: having the effect of calming a person or animal, or putting them to sleep; sedating, sedative.
The doctor prescribed a tranquilizing medication to help the patient sleep.
医生开了一种镇静药物来帮助病人入睡。
用法提示：tranquilizing作为形容词，描述药物具有镇静作用。
The tranquilizing effect of the herbal tea calmed her nerves.
这种草药茶的镇静效果使她的神经平静下来。
用法提示：tranquilizing作为形容词，指药物的镇静效果。
After taking the tranquilizing pill, the anxious dog became relaxed.
服用镇静药丸后，那只焦虑的狗变得放松了。
用法提示：tranquilizing作为形容词，表示使人或动物平静的。
tranquilizing 作定语时直接放在名词前，说明药物或作用具有使人平静、入睡的效果。
The nurse gave the patient a tranquilizing drug before surgery.
护士在手术前给病人用了一种镇静药。
表示“对……有镇静作用”时常用 have a tranquilizing effect on...，effect 前要加 a。
The gentle music had a tranquilizing effect on the nervous dog.
轻柔的音乐对这只紧张的狗有镇静作用。
作表语时多用于说明药物本身的性质，日常口语中不如作定语常见。
The drug is tranquilizing but not addictive.
这种药物有镇静作用，但不会成瘾。
grammar · medium
易错句子The nurse gave the patient a tranquilizing.
正确表达The nurse gave the patient a tranquilizer.
tranquilizing 是形容词（或现在分词），不能单独作名词；表示“镇静剂”这个名词时要用 tranquilizer。
grammar · medium
易错句子They used a tranquilized drug to calm the animal.
正确表达They used a tranquilizing drug to calm the animal.
修饰 drug 时要用 -ing 形式的 tranquilizing，表示药物具有主动的镇静作用；tranquilized 表示“被镇静的”，逻辑上不能修饰起镇静作用的药物。
grammar · medium
易错句子The patient was very tranquilizing after taking the medicine.
正确表达The patient was very tranquil after taking the medicine.
tranquilizing 描述药物等使人平静的作用，不描述人的感受或状态；表示人“平静的”应用 tranquil（或 calm）。
tranquilizing 只作形容词，描述药物“有镇静或催眠作用”，多作定语；sedative 更常作名词指“镇静剂”，作形容词时也常修饰 effect、drug 等。
tranquilizing 是形容词，修饰 drug 等名词，表示“有镇静作用的”；tranquilizer 是名词，指“镇静剂”这种药物本身，不能直接修饰 drug。
tranquil 形容地方或心境“宁静的”，不涉及药物作用；tranquilizing 专指药物使人或动物镇静、入睡的效果。
tranquil（词根）
tranquil + -ize
tranquil + -ize + -er
tranquil + -ity
tranquil + -ly
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