The flowers can be watered every day改为否定句The flowers ——— ——— watered every dayA dictionary can be used in the exam改为一般疑问句———— a dictionary __________　—————— in the examthis radio can be mended in the store完成附加疑问句this radio can be mended in the store,_______ _________ the classroom should be cleaned once a day就once a day提问—————— ———————— ———————— the classroom be cleaned?

1,cannot be
2,can be used
3,can't it
4.how ofen should

Can't be（情态动词后直接加not就可以了）
Can be used(一般来说把疑问词提前）
Can't it(前否后肯）
how often should

The flowers can't be watered every day.
Can a dictionary be used in the exam?
This radio can be mended in the store, can't it?
How often should the classroom be cleaned?

can't be
Can be used
can't it
How often should

The flowers (can't)(be) watered every day.
(Can)a dictionary (be)(used) in the exam?
This radio can be mended in the store,(can't)(it) ?
(How)(often)(should) the classroom be cleaned?
【公益慈善翻译团】真诚为您解答!