How to get the proper stem from an infinitive
- Step 1: divide the infinitive into syllables
- Step 2: determine whether the verb has a short or a long vowel. Recall, that if you have an open e, it is not necessarily a long vowel. It is only long when it is stressed.
- Step 3: subtract -en to obtain the crude stem
- Step 4: If the infinitive has a long vowel, make sure the stem is long too (add a vowel if necessary)
- Step 5: If the crude stem ends in two identical consonants, subtract one
- Step 6: If the crude stem ends in v or z, replace by f or s respectively.
All tenses
| present simple
| past simple
|
| ik [stem]
| ik [stem] + de/te
|
| je [stem] + t
| je [stem] + de/te
|
| hij [stem] + t
| hij [stem] + de/te
|
| we infinitive
| we [stem] + den/ten
|
| jullie infinitive
| jullie [stem] + den/ten
|
| ze infinitive
| ze [stem] + den/ten
|
| perfect
| pluperfect
|
| ik heb ge + [stem] + d/t
| ik had ge + [stem] + d/t
|
| je hebt ge + [stem] + d/t
| je had ge + [stem] + d/t
|
| hij heeft ge + [stem] + d/t
| hij had ge + [stem] + d/t
|
| we hebben ge + [stem] + d/t
| we hadden ge + [stem] + d/t
|
| jullie hebben ge + [stem] + d/t
| jullie hadden ge + [stem] + d/t
|
| ze hebben ge + [stem] + d/t
| ze hadden ge + [stem] + d/t
|
| future
| conditional
|
| ik zal infinitive
| ik zou infinitive
|
| je zult infinitive
| je zou infinitive
|
| hij zal infinitive
| hij zou infinitive
|
| we zullen infinitive
| we zouden infinitive
|
| jullie zullen infinitive
| jullie zouden infinitive
|
| ze zullen infinitive
| ze zouden infinitive
|
| future perfect
| conditional perfect
|
| ik zal hebben pp
| ik zou hebben pp
|
| je zult hebben pp
| jij zou hebben pp
|
| hij zal hebben pp
| hij zou hebben pp
|
| we zullen hebben pp
| we zouden hebben pp
|
| jullie zullen hebben pp
| jullie zouden hebben pp
|
| ze zullen hebben pp
| ze zouden hebben pp
|
pp = past participle.
A very useful web site is 
www.verbix.com.
Note that the examples above give you the unstressed personal pronouns. Some pronouns change when they are stressed in a phrase: je/jij, we/wij, ze/zij (both singular and plural).
Questions? 
