Verbs in a sentence are called Prädikate.
The position of the Prädikat depends on whether we have a verb consisting of one, two or three parts.
S V O
I buy clothes.
S V O
In the first case, it is in a tense that requires an auxiliary word like haben (have) or sein (be) (Perfekt, Plusquamperfekt, Futur I, Passiv). In these cases, the auxiliary word takes the second position in the sentence and the remaining part (Participle) takes the final position of the sentence.
Ich habe Kleider gekauft.
S auxV O V(participle)
I have bought clothes.
S auxV V(participle) O
Sometimes, verbs can have two parts even though they are in the present tense. In the infinitive, they are one word, however conjugated, they are separated. They are often made of a stem word and a remaining part, which is mostly a preposition. The stem word, which will be conjugated, takes the second position of the sentence and the remaining part (unchanged) takes the final position.
Beispiele: einkaufen, losgehen, einstecken, herumlaufen, schwimmen gehen, ausbrechen
Examples: shop, go, put into pocket, walk around, go swimming, break out
Ich kaufe Kleider ein.
S V(conjugated) O V(unchanged)
I shop clothes.
S V O
Ich werde nächte Woche eingekauft haben.
S V(aux) Adv Best V (participle) V(infinitive)
I will have shopped next week.
S V O
Abbreviations:
S – Subject
V – verb
O – Object
auxV – auxiliary verb
AdvBest – adverb