雅思18天倒计时基本功训练之动词不定式，请大家参考！
Part I：单词与短语
monster n.怪物，妖怪；fisherman n.渔民；sailor n.海员；claim v.声称，索要；at times有时候，偶尔；sight vt.看见；simply=only=merely (adv.)仅仅，仅是；occasionally adv.偶尔；unusual adj.非凡的，不一般的；creature n.生物；wash vt.冲击；rarely adv.很少地；out at sea在外海；peculiar adj.奇特的；Madagascar 马达加斯加；fishing boat渔船；miles out to sea海上数英里；powerful adj.强大的；pull on the line (动词结构)拽着钓鱼线；ordinary adj.普通的；make every effort not to…竭尽全力不……；eventually adv.最终；bring to shore 动词结构)带到岸上；shining adj.光亮的；silver n. & adj.银子，银色的；oarfish n.浆鱼；alive adj.活着的；at a depth of 在某个深度
Part II：语法学习
动词不定式的完成体和被动语态
概念解释：动词不定式也有完成体和被动语态。当比较之下应该使用不定式的地方所体现的动作或行为先于另外一个时间或动作完成的时候，它就需要用完成体；同样道理，当不定式部分体现的是被动态时，它就需要使用被动态。
示例1：USA announced to have finished another space travel.(与announced相比，to finish在前，故使用完成体形式)
示例2：He claimed to have met my grandfather yesterday, but he passed away 10 years ago!(与claimed相比，to meet在前，故使用完成体形式)
示例3：He was seen to have stolen 100 yuan from her purse.(与was seen相比，to steal在前，故使用完成体形式)
示例4：She was heard to have said something unfair for her husband.(与was heard相比，to say在前，故使用完成体)
示例5：He is said to have been stolen ten thousand yuan.(既是完成体，又是被动态)
示例6：Your dog was seen to have been picked up by a middle-aged man.(既是完成体，又是被动态)
Part III：综合训练
Fishermen and sailors sometimes claim (1) have seen monsters in the sea. (2) people have often laughed (3) stories told by seamen, it is now known (4) many of these ‘monsters’ (5) have at times been sighted are simply strange fish. Occasionally, unusual creatures are washed (6) the shore, (7) they are rarely caught out (8) sea. Some time ago, (9), a peculiar fish was caught (10) Madagascar. A small fishing boat was carried miles (11) (12) sea by the powerful fish (13) it pulled (14) the line. (15 realize) (16) this was no ordinary fish, the fisherman made every effort not (17) damage it in any way. (18) it was eventually brought (19) shore, it was found (20) be over 13 feet long. It had a head (21) a horse, big blue eyes, shining sliver skin, and a bright red tail. The fish, (22) has since been sent to a museum (23) it is (24 be) examined by a scientist, is called an oarfish. Such creatures have rarely been seen alive by man (25) they live (26) a depth of six hundred feet.
