How "forgotted" will be correct in few yearsThere are two kinds of verbs according to Zipf theory. They are regular and irregular verbs. So what are these. Your regular verbs are verbs who's past tense is obtained by adding a suffix to the root verb, for an example: play and played, inform and informed etc..; Irregular verbs on other hand are not obtained by simply adding a suffix. Ex: sing, sang and sung.
You might have noticed this yourself. So why do few words go into irregular category? Why is it- forget, forgotted and forgotted? The reason given to this is actually complex. Irregular verbs are the ones that almost sound the same in many languages. For an example words like eat and drink.
Eat, eaten and ate; drink, drunk and drank. This is because most irregular forms originated from Indo-European languages. There is a characteristic of this Indo-European languages.
Take Sanskrit for an example.
Bhavathi, Bhavathaha and Bhavanthi is how the verb structure goes. So clearly vowel sounds change in the past tense and participle.
That is why we have words that go like irregular verbs. So to correctly know the past tense of a word you need to know its origin. Because regular verbs obtained from Germanic languages follow a different structure. Since in German you can obtain a past tense by adding a suffix.
Schwimm(swim) and geshwimmen(swam) are the examples.
Summary, if a word comes from Latin or Germanic origin, it is a regular verb and you can just add a 't' or 'ed' to get its past tense directly. But Indo-EuIndo-European words are irregular with changing vowel sounds instead of a suffix.
But translations always kept happening. The words "have" and "make" had their past tenses as "haved" and "maked". But to make these words sound better, they were irregularized, making them "had" and "made" instead. But irregular verbs to became regular
A lot of them did. For a long time past tense of help was "holp". Today it is helped. It has been regularized. Words tend to become regularized when you use them a lot. We apparently use "help" a lot. So if we "forget" a lot, it will eventually regularize into "forgotted".