1. Inside means within something else.
Pattern: verb + noun + inside + noun
There are some little toy animals inside the box.
She put the money inside the envelope.
2. Inside (adverb) means indoors, within a building.
It started to rain, so we went inside.
Mind Blowing Beauty Tricks
How to clean your makeup brushes
Keep your investment in tiptop shape by cleaning your makeup brushes the right way.