ierenVerb

ierenVerb is a term used in German grammar to denote verbs whose infinitive ends in -ieren. These verbs are typically regular (weak) verbs and form their tenses in a predictable way. Many -ieren verbs are formed from nouns or adjectives by adding the suffix -ieren, and a large portion are borrowings from French, Latin, or English. The meaning often relates to the process or action associated with the root.

In present tense, -ieren verbs conjugate like other weak verbs. The stem is the infinitive minus -en, and the usual endings are -e, -st, -t, -en, -t, -en. For example: studieren → ich studiere, du studierst, er studiert, wir studieren, ihr studiert, sie studieren; informieren → ich informiere, du informierst, er informiert, wir informieren, ihr informiert, sie informieren. In the simple past (Präteritum), they take the regular -te, -test, -te, -ten, -tet, -ten endings: studierte, studiertest, studierte, studierten, studiertet, studierten. The past participle typically ends in -iert and is formed without the ge- prefix: studiert, informiert.

Usage and nuances: The ge- prefix is generally not used with -ieren verbs in forming the past participle. Infinitives remain untouched by umlauts or other stem changes in standard forms. These verbs are common in everyday vocabulary and cover actions such as studying, informing, repairing, researching, or financing. Examples include studieren, telefonieren, reparieren, informieren, finanzieren, korrigieren, recherchieren, fotografieren.

See also: German weak verbs, the -ieren suffix in verb formation, and lists of common -ieren verbs.

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