We must observe the rules. ✬

We should observe the speed limit. ✬

Observe his facial reaction when we mention a price. ✬

Drivers must observe the traffic rules. ✬

Just observe your cat and you will get to know him. ✬

You should observe the school rules. ✬

Tom likes to observe the people walking by. ✬

Tom likes to observe birds. ✬

This is a time of year when people get together with family and friends to observe Passover and to celebrate Easter. ✬

Observe your cat carefully. If you do so, you'll get to know your cat well. ✬