They're
When you can say they are for 'they're', you always spell it this way. Follow the link to find out when to use the other ways of spelling the word pronounced this way.
more information: they're their there
risen
Risen is the past participle of the irregular verb rise. Follow the link below to find out more and to listen to some examples.
more information: rise
grown
Grown is the past participle of the irregular verb grow. Follow the link below to find out more and to listen to some examples.
more information: grow
It's taken its
Notice the two ways 'its' is spelled. Follow the link to find out why.
more information: its & it's