what is the rule for fry - fries

cry - cries

he rule is that you change the "y" into "ies", well as far as i know that is the rule =)

Yes, that's right.

Change the "y" to "i" and then add the ending -- but not all endings require this.

fry - fries - fried -
but frying

This works for most words ending in "y" -- but there are some exceptions. Here are two:

pay - pays - paid - paying

say - says - said - saying

A dictionary will usually tell you how to form the different parts.

The rule you are referring to is related to the spelling change that occurs when a verb is transformed into its third person singular form in the present tense. In this case, the rule for words like "fry" and "cry" is to add -s to the base form of the verb to make them agree with a third-person subject.

To form the third person singular of most verbs, you simply add -s to the base form: "fries" and "cries" are the third person singular forms of "fry" and "cry" respectively.

However, it is essential to note that there are a few exceptions to this rule. If the base form of the verb ends in s, x, z, ch, or sh, you add -es instead of just -s. For example, "watch" becomes "watches", "fix" becomes "fixes", and "buzz" becomes "buzzes."

So, to summarize, the general rule is to add -s to the base form of the verb to create the third person singular form in present tense. Just remember the exceptions for words ending in s, x, z, ch, or sh, where you need to add -es.