Unit 7,Summer holiday plans,Introduce,T: Do you know anything about Australia ? T: Do you want to know something about London? Who is from London ,Words,children tldrn,名词，意为“孩子们”，为复数，其单数形式为child,eg：The children are playing in the playground. 孩子们在操场上玩耍,小练习：用所给词的适当形式填空： The _（child）climb up the trees,children,拓展】（1）通过内部元音变化的方法来构成复数形式。 eg：manmen ; womanwomen ; footfeet ; tooth teeth ; goose geese,Words,2）以f或fe结尾，在构成复数时，去掉f或fe加-ves。 eg：thief thieves ; wife wives ; life lives ; knife knives ; wol
