C5: Use -d or -ed Endings When Appropriate: A common error is to omit the -d or -ed ending on verbs. Recognize when they are needed.
John asked if he could take vacation time next week.
The Beatles had played in that arena twice.
He could have afforded to buy a suit after that job.
The garden was tended by Joshua.
I am excited by your presence.
The helicopters are serviced by highly trained professionals.