With adjectives:
* The soup was slightly too salty.
* She was slightly taller than her sister.
* The music was slightly too loud for the library.
With verbs:
* The wind slightly shifted direction.
* He slightly raised his eyebrows in surprise.
* I slightly underestimated the amount of time it would take.
With adverbs:
* He was slightly more confident after his recent success.
* The car was slightly slower than usual due to the rain.
* The painting was slightly darker than the original.
In comparisons:
* This dress is slightly more expensive than the other one.
* The weather is slightly warmer today than it was yesterday.
* Her voice was slightly higher than his.
To express a small amount of something:
* There's slightly too much sugar in this cake.
* The room was slightly warmer than it needed to be.
* He was slightly embarrassed by his mistake.
Remember that "slightly" means "a little bit" or "to a small degree." It's often used to soften the impact of a statement or to make it more subtle.