为什么读书时：read books 听收音机就是listen to the radio?为什么要加上to the?

为什么读书时：read books 听收音机就是listen to the radio?为什么要加上to the? 听广播是listen to the radio还是listen to radio listen to 后面如果加名词的话 要加the 为什么?the radio. radio.对listen to the radio提问 Do you like to watch TV or to listen to the radio?为什么不能改成wat listen to radio 还是listen to the radio listen to the radio还是listen the radio? listen to the radio 为什么加the 而 watch television不加the listen to the teacher 为什么要the 请问应该是listening the radio 还是listen to the radio? Listen to the radio.否定句咋改? perhaps _ people listen to the radio.