** Write sentences with the correct form of be. Add the possessive 's or s' where necessary. One sentence has no possessive 's or s'. 1 My fathers / computer / very old My father's computer is very old. 2 my teachers / desk / very big 3 his two sisters / names / Emma and Polly 4 their fathers / brothers/ their uncles 5 your mothers / sisters / your aunts 6 my sisters / my best friends​