For many different forms, Thamil verbs are formed irregularly for the inanimate mJ, mit (and nouns that could be replaced by these 2 pronouns). The following is a summary of how mJ and mit are dealt with for verbs and cases.
| class | past tense | present tense | future tense | |
| mJ | 1-4 | past tense stem + -mJ* | verb + fpw; + -mJ | verb + -ck;** |
| 6-7 | verb + f;fpw; + -mJ | verb + f;f; + -ck; | ||
| mit | 1-4 | past tense stem + -md* | verb + fpd;wd | verb + -ck;** |
| 6-7 | verb + f;fpd;wd | verb + f;f; + -ck; |
* There are 2 extra ways to make the past tense for mJ for class 3 verbs, while the past tense for mit for class 3 verbs is irregular.
** Verbs which are 2 short syllables and end in -c drop the final -c before adding -ck;
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Note: the information in the chart above completes the missing information from Lesson 3 on Verb Roots / Verb Suffixes.
From background information about Thamil cases, we saw that mit changes to mtw;W- before adding cases. But mJ changes to one of two possibilites. Sometimes, mJ changes to mjd;- before adding the case suffix. Other times, mJ just adds the case suffix. And the dative is just mjw;F
| case suffix / case | mJ | mit |
| -I (Accusative) | mij | mtw;iw |
| -f;F (Dative) |
mjw;F | mtw;Wf;F |
| -cld; (Sociative) |
mjDld; | mtw;Wld; |
| -XL (Sociative) |
mNjhL | mtw;NWhL |
| -,lk; (Locative) | mjdplk; | mtw;wplk; |
| -,y; (Locative) | mjpy; | mtw;wpy; |
| -,ypUe;J (Ablative) |
mjpypUe;J | mtw;wpypUe;J |
| -cila (Possessive) |
mjDila | mtw;Wila |
| -My; (Instrumental) |
mjdhy; | mtw;why; |
. | = word changes with case suffix |