Unit 5 Theme parks Language points学案
(1). They produced young generally by __________________.
它们一般通过孵蛋来繁衍后代。
【参考答案】laying eggs
【拓展延伸】
lay v. 放置;搁;下蛋;产卵
lay eggs 下蛋
lay sth. aside 把某物放在一边;积蓄(钱)
lay sth. down 把某物放下
lay the blame on sb. 责备某人
lay the table 摆桌子
lay emphasis / stress on sth. 把重点放在某事/某物上 【易混辨析】lie/lie/lay
动词原形 意义 过去式 过去分词 现在分词 lie 说谎 lied lied lying lie 躺;卧;位于 lay lain lying lay 放置;产卵 laid laid laying (2). (2017·北京改编)A machine with a specific purpose has another quality, one that we usually associate with living things: a wish to preserve its own ____________(exist).
【参考答案】existence
【拓展延伸】
1. exist vi. 存在;生存
exist on (=live on) 靠......为生
exist as作为......而存在;以......形态存在
exist in(=lie in) 存在于......之中
There exist(s)... 有/存在......
2. existence n. 存在
in existence现存的,现有的
come into existence产生;成立;开始存在
bring into existence使发生;使产生
3. existing adj. 目前的,现存的