Saxon Genitive

There are plenty of teachers who use blogs to teach Englsh, like me. Here you are a link to one of those with a lot of exercises to practise: http://elenacarriles.wikispaces.com/THE+SAXON+GENITIVE but you also have these links: click here or this one (but this includes past tenses)
To finish with, try to do oral exercises using this structure:

• Sara has a dog. It's black --- Sarah's dog is black
• Joe has a cat. It's white --- Joe's cat is white

Howerver, be careful with nouns ending in -S or sibilant sounds like in the following examples. The pronunciation changes a lot:

• Alice has a daughter --- Alice's daughter (you have to pronounce an extra syllable /ælɪsiːz/)

However, you don't write or pronounce the extra 'S with plural forms

• My cousins have a house --- my cousins' house ( /ˈkʌzənsiz/ )

Notice that if it's ending in -S you don't write an extra -s like in the Simpsons' dog.

See you in class.