I (ben) - I am = ben- im

You (sen) - You are = sen- in

He/she/it (o) -

We (biz) We are = biz- iz

You (siz) You are = siz- siniz

They (onlar) They are = onlar - lar

Now let´s look at some examples: 

Güzel 

Hasta 

You might have noticed with ´I am sick´ and ´we are sick´ that we have added a ´y´ between the ´hasta´ and the personal pronoun. That is because ´hasta´ ends in a vowel ´a´ and the pronoun starts with a vowel ´ı´...in turkish you must not put two vowels together, so in order to keep them apart you add the buffer letter ´y´ between the vowels

hastaım WRONG

hastaYım CORRECT