"Irregular" means that a perticular word does not obey the usual rules for inflection (an example of such a rule verb (without to) + "ed" -> simple past, e.g. "jump" -> "jumped"). For example "go" -> "went", "sing" -> "sang". You will usually simply have to learn those.
"Irregular" means that a perticular word does not obey the usual rules for inflection (an example of such a rule verb (without to) + "ed" -> simple past, e.g. "jump" -> "jumped"). For example "go" -> "went", "sing" -> "sang". You will usually simply have to learn those.