Saw is the past tense of the irregular verb see. Follow the link to find out more and to listen to examples.

A small number of common words in English have this 'ay' sound spelled 'et' at the end of the word. They are:
ballet
valet
beret
gourmet
cabaret
ricochet
buffet
sachet
bouquet
crochet.

Here found is the past participle of the irregular verb find. Follow the link to find out more and to listen to examples.

Here built is the past participle of the irregular verb build. Follow the link to find out more and to listen to examples.

Follow the link to find out whether you know when to spell the word weather or whether.