conj,prep

 

used to compare two things, people, amounts, etc

He's not as tall as his brother.

 

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.

 

for this purpose used to describe the purpose, job, or appearance of something or someone

She works as a waitress.

 

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.

 

because because

You can go first as you're the oldest.