Final answer:
The plural form of 'en' according to Rule #7 is 'ens'.
Step-by-step explanation:
The plural form of 'en' according to Rule #7 is 'ens'.
Rule #7 states that you should add an 's' to the end of a noun to make it plural, unless the noun ends in -s. In that case, you should add an apostrophe followed by an 's'.
For example:
- One pen -> Two pens
- One boss -> Two bosses'