For the sentence below, the possession has been correctly included.
1. The bird's beak was yellow.
Let us re-write this sentence to refer to a group of birds:
The ' indicates something about all the beaks. The second s is added in each case to indicate there is more than one beak and bird.
For the sentences below, write them correctly:
2. "Strawberry's - only £2 a punnet."
For these two, correct the possession, and re-write them to be about more than one thing:
4. The roads surface was cracking up under the weight of the lorry.