A cool site which can help confirm your knowledge of word classes, or aid you in tackling large amounts of text for a research project. It colour-codes a text you paste in according to the *most likely* part of speech (word class) each word would statistically represent.
BEWARE! It's just an algorithm, and it's not as clever as you! It will make errors, and needs a human to check each suggested tag.
https://parts-of-speech.info/