• Once (pernah)
Used in perfect tense in the sentence
Pattern : S + Have/has + once + V3
eg. I have once bought a car

• Once (segera)
eg. When he came and I taking a bath once I get out from the bathroom
At + once (serentak)
eg. They shoot me at once

• Ever
Used in interrogative sentence
Pattern : Have/has + S + ever + V3
eg. Have you ever gone to Bali?

• Never (not ever)
eg. Untill today I never wake up late