phr. to spend the time to do something for another person
She didn't even take the time to wish me good morning.

adj. feeling annoyed or discouraged because you cannot achieve what you want
By the end of the day, we were all feeling very tired and frustrated.

adj. having a feeling or belief that you can do something well or succeed at something
I am confident about my ability to do the job.

v. to be grateful for (something)
We really appreciate all the help you gave us last weekend.

phr. a bad use of time
The lecture was a waste of time.

adj. important, very useful, or beneficial
A lot of valuable information can be found in this book.