To indicate a significant difference or change:
* The price of gas has increased considerably since last year.
* She improved her performance considerably after taking extra lessons.
* The weather has cooled down considerably since the heatwave.
To emphasize the degree of something:
* He was considerably taller than his younger brother.
* The task was considerably more difficult than we anticipated.
* She felt considerably more confident after her success.
To express a noticeable amount:
* The company has grown considerably in the last few years.
* She donated a considerable sum of money to charity.
* The house was considerably larger than we expected.
To show a significant amount of thought or effort:
* He has given the matter considerable thought.
* They put considerable effort into planning the event.
* The project required considerable planning and coordination.
Remember: "Considerably" implies a significant change or difference. It is stronger than "slightly" or "somewhat" and indicates a noticeable amount or degree.