Here are some examples of how to use it in a sentence:
* Siya ay masikap na mag-aaral. (He is a diligent student.)
* Masikap siyang nagtatrabaho para sa kanyang pamilya. (He works diligently for his family.)
* Kailangan nating maging masikap para makamit ang ating mga pangarap. (We need to be diligent to achieve our dreams.)
You can also use the word mapagsikap which means "industrious" or "hardworking". It is a more formal word than masikap.