在英文句子中,什么时候要加be动词,什么时候不用?例：“she calmed the baby by giving him some milk”和“he was calm when i told him the bad news”中第一个要有be动词,而第二个不用?

在英文句子中,什么时候要加be动词,什么时候不用?
例：“she calmed the baby by giving him some milk”和“he was calm when i told him the bad news”中第一个要有be动词,而第二个不用?

两个单词相同,但词性不同.第一个作为动词,第二个作形容词,此句话没动词,当然要加BE动词