Don’t step onto/upon that mud.
opposite = ตรงข้ามกับ
I sat opposite a pretty girl on a sky train.
past = (เดิน/วิ่ง/แล่น)ผ่าน
A cat ran past me.
through = ลอดผ่าน; แหวกผ่าน
–My dog jumped through the car door onto the back seat.
–The train is moving through the tunnel.
–A superstar is walking through the crowd.