Here are some examples:
Positive Statements:
* I do love pizza. (Emphasis on the fact that you love pizza)
* He does know the answer. (Emphasis on the fact that he knows the answer)
* We do go to the gym every week. (Emphasis on the regularity of going to the gym)
Negative Statements:
* I don't like spicy food. (Emphasis on the dislike of spicy food)
* She doesn't understand the instructions. (Emphasis on the lack of understanding)
* They don't live in the city anymore. (Emphasis on the change in residence)
Questions:
* Do you like to read? (Emphasis on seeking an answer about reading preference)
* Does she play the piano? (Emphasis on seeking an answer about piano playing)
* Do they work on Saturdays? (Emphasis on seeking an answer about their work schedule)
Note:
* The emphatic form is often used for emphasis, but it can also be used for other purposes, such as to make a statement more forceful or to express surprise or disbelief.
* In the third person singular (he, she, it), we use "does" instead of "do".