3.详细解说
1.“be(not)good for…”意思是“对…(没)有好处”,例如:Fresh fruit and vegetables are good for you.(新鲜的水果和蔬菜对你的
身体有好处。)Watching too much TV isn't good for you.(看太多电视对你没有好处。)如果想表达“对…有害处”,则可以说“be bad for...”,例如:Smoking is bad for your health.(吸烟对你的健康有害。)Too much salt can be bad for you.(吃太多的盐会对你的健康有害。)另外,口语中常会听到“Good for you.”的说法,可不要想当然地认为它的意思是“对你有好处。”其实它是用来对某人的做法表示赞同的,例如:-I've decided to accept the job. -Good for you.(-我决定接受这份工作。-你做得对。)
2.在“Off to your homework now!”一句中“off”是副词意为“离开,走开,远离”,例如:Are you ready? Off we go.(你准备好了吗?我们走。)I must be off now.(我得走了。)They were off to Italy and wanted to make an early start.(他们离开这里去意大利了,他们想早点儿开始。)
adv. 绝对地,完全地;独立地