as (conjunction)

1. We use 'as' to talk about job or function

• I worked as a waiter for 2 years when I was a student (job)
• He used his body as a shield to protect her (function)

2. In comparisons, the structure ‘as' + adjective + 'as’ is often used

• He’s not as tall as his brother

3. In some comparisons, conjunction 'as' is followed by a clause with a subject and a verb

• He's a very good doctor, as his father was

4. These expressions always use 'as'

• As you know, classes restart on January 15th
• I tried using salt as you suggested but the stain still didn’t come out
• As we agreed the company will be split 50/50 between us
• Their house is the same as ours