Do singular nouns which end with consonant+ O turn into plural by adding -ES?
I'm a little bit confused because of conflicting information that I found in sites.For example: one site says that singular nouns which end with consonant + O turn into plural by adding -ES. For example, tomato > tomatoES. But when I thought about it a little bit, I was found that the singular noun photo which becomes to plural (photos) by S only having said that it should be "photoes" based on the mentioned rule. It cause me to have a doubt about this theory.
In addition, I found also another post that says that there is no rule for these singular nouns which end with O and students simply should only learn them. Then I'm not sure about this grammatical rule.