Together, they crossed busy street safely.
Meaning: The old man and the young boy walked over the busy road together without any problems.
Choice of Words: Together means in the company of another or others. They is a pronoun referring to the old man and the young boy. Crossed means to go from one side of something to the other side. Busy means having a lot of activity or people. Street is a public road in a city or town. Safely means without harm or danger.
Alternative Expressions
Related Expressions