as .... as › used to compare two things, people, amounts, etc: He's not as tall as his brother. She earns three times as much as I do.
WHILE › used to describe two things happening at the same time or something happening at a particular time: He was shot in the back as he tried to escape. I think your opinions change as you get older.
FOR THIS PURPOSE › used to describe the purpose, job, or appearance of something or someone: She works as a waitress. It could be used as evidence against him.
LIKE › in the same way: This year, as in previous years, tickets sold very quickly.
IN THIS WAY › used to describe the way in which people see or think of something or someone: She was regarded as a great beauty in her day. Most people think of nursing as a female occupation.
BECAUSE › because: You can go first as you're the oldest. As I'd never been to Poland before, I bought a guidebook.
as if/as though › used to describe how a situation seems to be: It looks as if it might rain.
as for › used to talk about how another person or thing is affected by something: I was pleased. As for Emily, well, who cares what she thinks.
as from/as of formal › starting from a particular time, date, etc: The new conditions are effective as of 15 May.
as to formal › about: There's no decision as to when the work might start.