twice

On two occasions, or two times within a period.

• I called her twice.
• He brushes his teeth twice a day.
• Have you seen that film twice?

How to use it: twice a + period of time (We meet twice a month.)

Similar words: two times

Common phrases: twice a day, twice a week, twice this year

On two occasions, or two times within a period.

• She knocked twice.
• We have visited the museum twice this year.
• Did you check the address twice?

How to use it: twice a + period of time (They clean the windows twice a year.)

Similar words: two times

Common phrases: twice a day, twice a month, twice today

Two times as much, as many, or as great.

• This bag costs twice as much.
• Their garden is twice the size of ours.
• She earned twice what I earned last year.

How to use it: twice as + adjective/adverb + as (This train is twice as fast as the bus.); twice the + noun (Our new flat is twice the size of the old one.)

Similar words: double

Common phrases: twice as much, twice the size, twice as fast