早教吧作业答案频道 -->英语-->
新概念英语①Hecan'thavebeenill.(改肯定句)②Hemusthavebeensleeping.(改否定句)③Shemusthavebeenadoctor.(改否定句)④Theycan'thavebeenwatchingTV.(改肯定句)⑤她那时不可能在唱歌.她那时一定在画画.
题目详情
新概念英语
①He can't have been ill.(改肯定句)
②He must have been sleeping.(改否定句)
③She must have been a doctor.(改否定句)
④They can't have been watching TV.(改肯定句)
⑤她那时不可能在唱歌.
她那时一定在画画.
⑥他现在不可能在扫地.
一定在看世界杯.
①He can't have been ill.(改肯定句)
②He must have been sleeping.(改否定句)
③She must have been a doctor.(改否定句)
④They can't have been watching TV.(改肯定句)
⑤她那时不可能在唱歌.
她那时一定在画画.
⑥他现在不可能在扫地.
一定在看世界杯.
▼优质解答
答案和解析
1.He must have been ill.
2.He can't have been sleeping.
3.She can't have been a doctor.
4.They must have been watching TV.
5.She can't have been singing then.
She must have been drawing then.
6.He can't be sweeping the floor,he must be watching the World Cup now.
2.He can't have been sleeping.
3.She can't have been a doctor.
4.They must have been watching TV.
5.She can't have been singing then.
She must have been drawing then.
6.He can't be sweeping the floor,he must be watching the World Cup now.
看了 新概念英语①Hecan'th...的网友还看了以下:
高一数学对任意x,y∈S,若x+y∈S,x-y∈S,则称S对加减封闭,S为R的真子集.(1)试举一 2020-08-01 …
对任意X,Y属于S,若X+Y属于S,X-Y属于S,则称S对加减封闭,S为R的真子集.①试举一例S② 2020-08-01 …
设S、T是两个非空集合,且T真包含于S,S真包含于T,令X={x|x∈T且x不属于S},Y={y| 2020-08-01 …
类比“两角和与差的正余弦公式”的形式,对于给定的两个函数,S(x)=,C(x)=,其中a>0,且a 2020-08-03 …
类比“两角和与差的正弦、余弦公式”的形式,对于给定的两个函数S(x)=[e^x-e^(-x)]/2 2020-08-03 …
类比两角和与差的正弦,余弦公式,对于给定的两个函数S(X)=(E^X-E^-X)/2,C(X)=( 2020-08-03 …
已知质点运动方程为r(t)=x(t)i+y(t)j其中x(t)=(m/s)t+2m,y(t)=(1/ 2020-11-01 …
y''+y'+y=0作拉氏变换,(s^2+s+1)L(y)=0特征方程:s^2+s+1=0为什么是y 2020-11-08 …
已知某产品的数量s与所需ab两种原料数量x(t),y(t)间满足函数s(x)已知某产品的数量s与所需 2020-11-19 …
二重积分的问题设区域D的面积为S,S=x^2+e^ydS=?若S=f(x,y)dS=?dS=?请用x 2020-11-28 …