6.短语动词keep on + v-ing相当于continue + to-v/v-ing意为“继续”，“不顾困难而坚持下去或坚持做某事”。如：
Although it started raining, they kept on working．虽然开始下雨了，他们仍继续坚持工作。
The teacher kept on asking the students questions until the bell rang．老师不断向学生提问，直到铃响。
keep doing sth．和keep on doing sth．意义及用法相同，但后者更强调决心和重要性。如：
He kept coughing all morning．他整个上午不停地咳嗽。
He kept on phoning me, but I really didn’t want to talk to him．他不断给我打电话，但我实在不想和他说话。
keep或keep on后跟表示动作的-ing形式，不可接动词不定式或表示静止状态的-ing形式，不能说He kept on to talk. 也不能说They kept on sitting.
7.as well as意为和，同；不但……而且。如果主语是单数，后面有as well as引起的短语，谓语动词仍用单数。如：
On Sundays, his landlady provided dinners as well as breakfast．星期日，房东供应他正餐和早餐。
Lily as well as Lucy was at home．莉莉和露西都在家里。
as well as还可作“不但……而且”解，相当于not only…but also，但前者强调句子重心在as well as前，后者强调重心在but also后。如：
We students of English should study Chinese as well as English. ( =We students of English should study not only English but also Chinese. ) 我们学英语的学生不但要学英语，还要学汉语。
It is important for you as well as for me．它对你和对我同样重要。
8.短语go crazy意为发狂，发傻，发疯。go（link-v．）表示“变为”，后跟形容词，有时跟过去分词等。如：
Your hair has gone quite white．你的头发全白了。
She went pale at the news．听见这消息她脸色变苍白。
The children must not go hungry．孩子们不应该挨饿。
Fruit quickly goes rotten in hot weather．热天里的水果很快腐烂。
All the men here go armed．这里所有的人武装起来。
表示“变为”，“改变”还有get，turn，grow，come，run等连系动词。如：
He has run out of ink．他用完了墨水。
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My dreams came true at last．我的梦想终于实现了。
Its getting warmer and warmer in spring．春天里天气越来越暖和。
【知识扩展】
1．课文中struggling in…是现在分词短语作原因状语，相当于：As I struggled in…。如：
Being old enough to learn to read and write, she was sent to a nearby primary school．由于她年龄大得可以学读书写字了，她被送往附近的小学上学。
Not knowing how to find the place, I went to ask a policeman．由于不知道如何找到地方，我去问警察。
struggle （v．/n．）意为奋斗，斗争；挣扎（着走）等。如：
He struggled in the dark, without advice, without encouragement．他在黑暗中奋力挣扎，无人给他指教或鼓励。
A bird was caught in the net and was struggling to get free．一只鸟被捕落网，正挣扎着试图得到自由。
He tried to escape but his struggles were useless．他试图逃跑，但他的挣扎是徒劳的。
My teacher 教学目标