the camera isn`t missing.it still lies where i laid it a month ago

题目

the camera isn`t missing.it still lies where i laid it a month ago
为什么不用missed?为什么用laid而不是lay?

答案

1 it still lies where i laid(及物动词,一般过去时) it a month ago
2 missing----不见了,失踪了（是形容词,没有ed的形式）