Verbal Stem Song
The infinitives give the present stem,
The perfect stem,
The supine stem,
The infinitives give all the stems,
All the verb stems!

amāre – to love
amāvisse – to have loved
amātum (esse) – to have been loved
amā-, amāv-, amāt-

mōnēre – to warn
monuisse – to have warned
monitum (esse) – to have been warned
mōnē-, monu-, monit-

legere – to read
lēgisse – to have read
lēctum (esse) – to have been read
leg-, lēg-, lēct-

capere – to take
cēpisse – to have taken
captum (esse) – to have been taken
cap-, cēp-, capt-

audīre – to hear
audīvisse – to have heard
audītum (esse) – to have been heard
audī-, audīv-, audīt-

The infinitives give the present stem,
The perfect stem,
The supine stem,
The infinitives give all the stems,
All the verb stems.