The phrase "add more time" is correct and can be used in written English.
It can be used to indicate that an additional amount time is desired or required for something. For example: "We may need to add more time to our project schedule in order to finish on time."
I add more time to her job because she ends up having to refold my work.
This would add more time to commutes, but perhaps we are a little too interested in getting to work on time to advocate for this solution.
American said that it would slow the number of arrivals and departures and add more time between connecting flights at its hubs in Dallas and Chicago.
Electronic medical records have become a necessary part of the process, although sometimes they're frustrating in that they can add more time to the encounter while actually reducing the doctor's interaction with the patient.
While players admit doubles strategy and net play are good for their singles games, they are often reluctant to add more time and taxation to their schedules and bodies.
The waiver opens the door for cash-strapped school districts to use funds that now support afterschool and summer programs to merely add more time to the school day.
And each new app or Web site adds more time to the routine.
The company also has added more time for testing into the development of new vehicles.
In addition, she said, Tiffany hand-wraps all of its wares, adding more time to the sales process.
Already, more than 1,000 public schools across the country, including numerous charter schools, have added more time to the school day and year.
Merely adding more time to existing tasks or classes won't make schools or students more successful in school or more productive in life.
