Final answer:
The /er/ sound can be spelled by different phonograms such as -er, -ir, and -ur.
Step-by-step explanation:
The /er/ sound can be spelled by different phonograms. The most common phonograms that make the /er/ sound are -er, -ir, and -ur. For example, in the word 'teacher', the -er spelling represents the /er/ sound. In the word 'girl', the -ir spelling represents the /er/ sound. And in the word 'fur', the -ur spelling represents the /er/ sound.