If you are learning Chinese words in free Chinese lesson, you may often see the words 出来and 出去. Both of them can be used after the verb as directional complement. When we use 出来, it means go from inside to outside. The actions done are toward the place that the speakers are. We can say 从教室出来. When learning in free Chinese lesson, you should know the action of 出去 is from outside to inside and the actions are leaving the speakers place. You may hear people say 出去走走.

The group of words 从前and 以前both indicate the time earlier than now. When you learn Chinese words, you should know 从前 implies the time has pasted like 从前山上有座庙，现在不见了. You should know it usually used separately without the structure of…从前. In free Chinese lesson, you may learn 以前 is used to describe a time point before things happen like 考试以前. It is often seen with the structure…以前.