Sentence examples for i used a from inspiring English sources

The phrase "I used a" is grammatically correct and can be used in written English.
It is usually used to talk about something that was previously used or done. Example: "I used a different approach to solve the problem." (The speaker is talking about a previous attempt or method they used to solve the problem.) Another example: "I used a pencil to sketch the design before using a pen." (The speaker is describing the tools they used in sequence.).