Adding a suffix to words ending in l(Please note that this pattern doesn't fully apply in US English. If you're American you write traveled, rivaling, signaled and canceled.)
With these words you need to notice whether there is
one vowel or two vowels immediately before the l.
Look for a pattern in the following examples:
The patterns are fairly obvious aren't they?
Test your understanding of them by crossing out the wrong spellings in each of the following sentences.
1. Biff labeled/labelled the packages, threw them on the trolley, and wheeled/wheelled them out of the room.
2. The watchman patroled/patrolled at hourly intervals.
3. The referee sent off the striker for fouling/foulling the goalkeeper.
4. Marianne's fees for the modeling/modelling course totaled/totalled more than a month's salary.
5. A loud bang signaled/signalled the start of the sailing/sailling race.
6. Sammy controled/controlled the speed of the haulage/haullage rope using a red lever.