主语＋谓语＋宾语：主语是名词性的词，谓语是动词或动词短语，宾语是动作的承受者或解释谓语的结果。
She doesn’t like singing.
她不喜欢唱歌。
Mike played basketball yesterday.
迈克昨天打篮球了。
I prefer the one on the right.
我更喜欢右边的那个。
主语 系动词 表语：主语是名词性的词，系动词就是be动词，表语则用来表示主语的状态、样子等等。
I am a teacher.
我是一名教师。
Her voice sounds sweet.
她的声音听起来很甜美。
His hobby is taking photos.
他的爱好是拍照。
1）肯定陈述句
I like singing and dancing.
我喜欢唱歌和跳舞。
2）否定陈述句
She doesn't want to go out.
她不想出去。
①一般是在be动词或情态动词后加not。
Mary was at home yesterday. —>
Mary was not at home yesterday.
玛丽昨天没在家里。
Tom can sing English songs.—>
Tom can not (can't) sing English songs.
汤姆不会唱英文歌。
②不含be动词或情态动词的，行为动词前要用助动词的否定式（don’t，doesn’t，didn’t），后面跟动词的原形。
He likes drawing pictures.—>
He doesn’t like drawing pictures.
他不喜欢画画。
She went to the park yesterday. —>
She didn’t go to the park yesterday.
她昨天没有去公园。
