• Basic forms
• 付ける — to attach; to add / base form
• 付けます — attach; add / masu form
• 付けた — attached; added / ta form
• 付けて — attach and … / te-form
• 付けない — do not attach / negative
• 付ければ — if (you) attach / conditional
• 付けろ・付けよ — attach it! / imperative
• Common expressions
• 名前を付ける — give a name
• ラベルを付ける — attach a label
• 気を付ける — be careful

付ける（つける） is an ichidan verb. You actively attach or add something to something else.

• Basic forms
• 付く — to be attached; to stick / base form
• 付きます — sticks; is attached / masu form
• 付いた — stuck; became attached / ta form
• 付いて — sticking; attached and … / te-form
• 付かない — does not stick / negative
• 付けば — if it sticks / conditional
• Common expressions
• 汚れが付く — dirt sticks
• 電気が付く — the light turns on
• 傷が付いた — got scratched

付く（つく） is a godan verb. It describes something becoming attached or sticking naturally.