在英语中,表示时间时,什么时候要加介词,什么时候不要加?
比如以下例子:
1. I will play soccer tomorrow . (这句话要不要加介词?)
2. I will play soccer tomorrow morning. (这句话要不要加介词?)
3. I played soccer yesterday. (这句话要不要加介词?)
4. I played soccer yesterday morning. (这句话要不要加介词?)
5. I was born on a May afternoon. (这句话为什么要加介词?)
6. My birthday is August 1st. (这句话要不要加介词?)
来个高手来帮帮我.