【问】 我总搞不清下列词的意义和用法：lie，lay，laid，laying，lying。
 【答】 首先应牢记lay是个及物动词，具有“放置”、“架设”、“生(蛋)”等基本词义，其四种基本形式如下：
 原形 过去式 现在分词 过去分词
 lay laid laying laid
 1. They laid me down on the bed.
 他们把我放在床上。
 2. A bridge is to be laid across the river.
 河上将要架起一座桥。
 3. The enemy troops were badly battered by the PLA soldiers，and most of them laid
 down their arms.
 敌人被解放军打得溃不成军，大多数士兵放下了武器。
 4. They are laying a new oil pipe.
 他们正在敷设一条新石油管道。
 5. A black hen lays a white egg.(Prov)
 黑鸡下白蛋。(丑妇生俊儿。)
 lie是个不及物动词，具有“躺”、“位于”、“在于”等基本词义，其四种基本形式为：
 原形 过去式 现在分词 过去分词
 lie lay lying lain
 1. I lay awake for about ten minutes.(Davies)
 我醒着躺了大约10分钟。
 2. The village lies to the north of the city.
 这个村子位于城市的北面。
 3. He was lying on the bed.
 他躺在床上。
 4. The solution lies in social and political reform.
 解决方法是社会和政治改革。
 5. Happiness lies in contentment.
 幸福即在于满足之中。(知足者常乐)
 作“撒谎”解的lie，其四种基本形式为：
 原形 过去时 现在分词 过去分词
 lie lied lying lied
 请改正下列各句的错误：
 1. One man was arrested. As police tried to drive him away，demonstrators laid down inthe path of their vehicle. (Daily Telegraph)
 2. We broke down the door and found Mrs. Brown laying on the floor.
 3. I just wanted to lay down and have a rest.
 请做下面的英语试题：
 1. “What did Joe do?”“He______asleep all morning. ”
 A. lain B. laid C. lay D. lying
 2. The typewriter
 A. was laying on the table，where it had laid all week
 B. was lying on the table，where it had laid all week
 C. was laying on the table，where it had been laid all week
 D. was lying on the table，where it had been laid all week(TOEFL)
 3. It is said that_____.
 A. for six months the factory machinery has laid idle
 B. I finished laying the bricks，but they did not lay evenly
 C. my mother immediately set the kettle on the stove
 D. we must have set three hours waiting for him(TOEFL)
 4. Before discussing the steps in detail，__.
 A. a general principle should be laid down
 B. I should like to lie down a general principle
 C. I'd like to lay down a general principle
 D. a general principle lies
 5.
 6.
 7.
 8.
 9.
 10. The doctor______every afternoon.
 A. adviced that Jim lie down B. adv.iced that Jim lay down
 C. advised that Jim lie down D. advised that Jim lay down
 11. Do you know the boy ______ under the big tree?
 A. lay B. lain C. laying D. lying(全国高考英语试题，1989)