100.across，past, through

100.across，past, through
across，横过，跨过，从表面通过
Mary likes helping others ，for example， she often helps the old walk across the street.
past，经过.走过.路过，只从某人或某物旁边经过
一一Excuse me, can you tell me the way to the park？
一一Walk along this road and you will go past a bank ，then you will find the park near the bank .
through穿过.通过.指从空间内部通过
The sunshine got into my room through the window and my room became bright and warm.