_____ many times, but he still doesn’t know how to operate t

___ several times,but he still doesn't know how to use the c Having been told many times,he still didn’t know how to do i 语法 ___several times,but the boy doesn't know how to answer t ( ) many times,but he still couldn't remember . ____ many times but he still couldn't understand it （化为简单句） He really doesn't know how he can operate the machin having been told mang times ,he still didn't know how to do but she doesn't know how to _____ A.get there B.get to there he had been told many times but he still couldn't understand —— many times,I still could not understand how to operate th he doesn't know how to do next（改错） He still doesn't know和Still he doesn't know的区别