Here are some common expressions that use ‘as…as’.
The pattern is ‘as (adjective) as (noun)’.
As cold as ice (Freezing)
1. Feel my toes – they’re as cold as ice.
2. You should take some gloves today, it’s as cold as ice outside.
As fit as a fiddle (Very healthy and strong)
1. My grandmother is 89 years old, but she’s as fit as a fiddle.
2. How are you? I’m as fit as a fiddle thanks.
As good as gold (Well behaved)
1a. Has my son behaved at school today?
1b. Yes, he’s been as good as gold all morning.
2. Last week he was as good as gold, but this week he’s been a bit naughty.
As light as a feather (Very light)
1. My new pillow is as light as a feather.
2. This chiffon cake is as light as a feather.
3. He’s been on a diet for 6 months and he’s as light as a feather now.
As busy as a bee (To be moving about quickly doing many things)
1. I haven’t sat down all day. I’ve been as busy as a bee.
2. John is as busy as a bee – he never has any free time.
As dull as dishwater (To be very boring)
1. This movie is as dull as dishwater. Shall we go home?
2a. Are you a fan of baseball?
2b. Not at all. I think it’s as dull as dishwater.
As good as new (To be in very good condition)
1. It looks old now, but after I paint it, it will be as good as new.
2. I took my computer to the shop to be repaired. It’s as good as new now.
As plain as the nose on your face (To be very obvious)
1. He’s not happy working here – that’s as plain as the nose on your face.
2. Steve definitely likes Sarah. It’s as plain as the nose on your face.