请用下列短语的适当形式补全句子。
(1)The elephants often ________.
(2)My mother always ________ and buys lots of clothes.
(3)Alex is a good boy and he always ________ and helps teachers.
(4)This cat is naughty and it sometimes ________.
(5)My father is healthy and he never ________.
(6)This summer is very hot and I often ________.
(7)My grandpa and grandma often ________ and watch TV.