3.英语选词填空和改错题

一、Can; must; should; need的含义及用法
Can：
1）肯定句表示可能性,疑问句和否定句表示必然性
2）表示自身具有的能力
3）口语中取代may表示允许
Must
1）表示有把握的可能性,经常用推测,相当于汉语的“必定/一定”
2）表示道德良心、法律或者习惯的要求,相当于汉语的“必须/应该”
Should：
1）表示期望的可能性,常用于虚拟语气
2）表示义务或职责的要求,
Need：
1）情态动词只用于疑问句、否定句或条件句（肯定句只能用need to do）,
2）needn't（不必）是 must（必定）的否定形式
题目解析
1.I told Sally how to get here,but perhaps I (should have written) it out for her.——这里是对过去的虚拟,意思是过去曾告诉过怎么走,但是本该给她都写出来,事实上却没有这样做.
2.We (I should have studied) last night,but we went to the concert instead.——对过去的虚拟,意思是昨晚本该学习,但是没有这样做,反而去听了音乐会
3.I didn’t hear the phone.I (must have fallen) asleep.——表示对过去的推测,意思是没听到电话响,必定是睡着了.
4.The plant is dead.I (should have given) it more water.——对过去的虚拟,意思是庄稼现在死了,但是过去我本该给它多浇些水就不会成了现在的样子
5.There was plenty of time.She (needn’t hurry).——不必
二、改错题,：
The day before the speech contest English teacher 1.添加物主代词my (English teacher是已知的,下文有提示)
talked to me.She said that she and my schoolmate all 2.schoolmates (all指三个以上同学必须用复数)
wish me success,but it did not matter that I would 3.that改为if（matter后的宾语从句表示胜负与否）
win or not.When I was on the stage the next day,I left so 4.left改为felt（形容词nervous是表语,需要用系动词feel表示觉得紧张）
nervous as I shook like a leaf.There were so many people \x055.as改为for（for表示原因是陈述紧张的理由,而as则表示由发抖导致的紧张）
absent!Suddenly,I caught sight of my English teacher in \x056.无错
the crowed.She was smiling but nodding at me.I remembered.7.but改为and（smiling和nodding顺理成章,不存在相对关系）
her words and calm down.I did a good job and won the first 8.calm 应该用过去式 calmed
prize.Now my picture and the prize is hanging in the library.9.is 改为 are（挂起来的有照片和奖品,属于复数）
Whenever I see them I will often think of my English teacher.10.去掉 will（指的是现在而不是将来）