Simple:
* My motivation for studying is to get a good job.
* The team's motivation was low after their loss.
With Adjectives:
* Her strong motivation helped her achieve her goals.
* His lack of motivation was evident in his poor performance.
With Verbs:
* The speaker motivated the audience to take action.
* The manager's speech demotivated the employees.
In a Phrase:
* I need to find my inner motivation to get this project done.
* The teacher used positive motivation to encourage her students.
In a Figurative Sense:
* Her motivation was a flickering candle in the wind, threatening to go out.
* His motivation was like a rocket, propelling him forward.
The context of the sentence will determine the best way to use the word "motivation."