This is a list of irregular verbs in the English language. The citation form (the infinitive) comes first (with a link to the Wiktionary article on the verb), together with the present tense forms when they are different, then the preterite or simple past, and finally the past participle. The right hand column notes whether they are weak or strong and whether they belong to a subclass, and links to discussions elsewhere. Typical irregularities in weak verbs are the assimilation of dentals (bended > bent) and vowel reduction (*keeped > kept). Some of these verbs are irregular in British or American English only; in many cases, such as spell (spelt vs. spelled), learn (learnt vs. learned), and spill (spilt vs. spilled), American English uses the regular form, while British English tends to favor the irregular. In other cases, the opposite is true (dived and sneaked in Britain, also dove and snuck in America); Australian English, New Zealand English, and South African English tend to follow the British practice, while Canadian English often sides with the American usage. See further at American and British English differences. In this table, the preferred or more common usage is generally listed first, though for some words, the usage is nearly equal for the two choices. There are no English verbs with an irregular present participle.
You can look at the list here These verbs from the list above are spelled the same in the simple past as in the present tense (excluding compounds such as set, beset, inset, upset etc.): beat, bet, burst, cast, cost, cut, hit, hurt, let, put, quit, read, set, shed, shut, slit, split, spread. (Note that of all the preceding, only "read" is pronounced differently in the past tense from the present tense.) In addition, the following verbs optionally have a past tense the same as the present tense: bid, fit, knit, rid, shit, spit, sweat, thrust, wed, wet. Furthermore, all these verbs that have mandatory or optional past tense the same as present tense also have a (sometimes optional) past participle that is identical to the present tense. [edit]Multisyllable irregular verbs not directly based on single-syllable irregular verbs There are only three multisyllable irregular verbs whose meaning cannot be analyzed on the basis of the meaning of an affix and the meaning of a single-syllable irregular verb to which it is attached. These are begin - began - begun, beseech - besought - besought, and forsake - forsook - forsaken. (Of these, beseech comes from Old English besecan (“to seek or inquire about”), which was equivalent to be- + seek, but the meaning has since evolved away from that of seek.)