be 一般现在时 is/ am /are he is / I am/ you are a student.
一般过去时 was/ were I was/He was / you were a student a year ago.
have 一般现在时 has / have I have/ You have He has no money now.
一般过去时 had we had no money in the past.
猜你喜欢
- 1某种药品原价为36元/盒，经过连续两次降价后售价为25元/盒.设平均每次降价的百分率为x，根据题意所列方程正确的是（ ） A.36（1-x）2=36-25 B.36（1-x）2=25 C.36（1-2x）=25 D.36（1-x2）=25
- 2sit,buy,run的现在分词是?
- 3一电路有电容与电阻,给电容充电,流过电阻的电量为Q电阻电压由U变成零,热能可以是UQ/2吗?该怎么算?
- 4一道数学题：如果甲数的三倍等于乙数的二分之一,那么甲数与乙数的比是（ ）
- 5二次函数y=ax2+bx的顶点坐标跟一般式的顶点坐标一样么
- 6将函数y=cos2x的图像向右平移π/4个单位长度,得到函数y=f(x)*sinx的图像,则f(x)可以是
- 7关于瀑布飞溅撞击在岩石上,溅起朵朵水花的诗句
- 8There is going to be an American film tonight.中的There is going to be和 an American film分别是什么
- 9描写水的现代诗
- 10单位冲击函数可以求导么?如果可以,他的一阶导数是什么,还有n阶导数呢?