题目内容：

词形转换1.hide(过去式,过去分词)_____ _____2.win(过去式)____3.friend(形)____6.shelf(复)____
7.downstairs(反义词)_____8.correct(副词)____9.danger(形)____10.fall(过去式,过去分词)_____ _____11.sell(过)____

优质解答

hide-hid-hidden
win-won-won
friend-friendly
shelf-shelves
downstairs-upstairs
corrent(+ly)
danger(+ous)
fall-fell-fallen
sell-sold-sold