alert、vigilant、attentive、careful 1. watchful:形容词“警惕的;警觉的;留心的”(侧重时刻关注可能出现的危险或情况,搭配“watchful eye 警惕的目光;be watchful for danger 警惕危险”,如“Parents should be watchful of their children. 父母应留心自己的孩子。”); 2. watchful vs. alert:alert形容词/动词“警觉的;提醒”(侧重快速反应危险,如“alert to danger 对危险警觉”),可与watchful换用,alert更侧重“反应快”; 3. watchful vs. vigilant:vigilant形容词“警惕的;警觉的”(正式用语,侧重长期保持警惕,如“vigilant guard 警惕的守卫”),watchful更口语化; 4. watchful vs. attentive:attentive形容词“专心的;体贴的”(侧重专注于某事或关心他人,如“attentive student 专心的学生”),watchful侧重“警惕危险”。
精选例句
高考
1、 The best thing is to be watchful and see the family doctor for any change in your normal health.