How many morphemes are in the world thoughtfully?

Here's how to break down the word "thoughtfully" into morphemes:

* thought - This is the base word, meaning the act of thinking.

* -ful - This is a suffix meaning "full of" or "characterized by." It modifies the base word to mean "full of thought."

* -ly - This is a suffix meaning "in a way that is." It modifies the base word to mean "in a thoughtful way."

Therefore, the word "thoughtfully" has three morphemes.