öffnete
"öffnete" is the past tense, third-person singular form of the German verb "öffnen." The verb "öffnen" means "to open" in English. Therefore, "öffnete" translates to "opened." It is used to describe an action of opening that occurred in the past, performed by a singular subject. For example, in the sentence "Er öffnete die Tür" (He opened the door), "öffnete" indicates that the action of opening the door was completed by "er" (he) at some point in the past. Similarly, in "Sie öffnete das Fenster" (She opened the window), "öffnete" denotes the past action of opening performed by "sie" (she). The verb is a regular verb in German, meaning its past tense is formed by adding the suffix "-te" to the verb stem. The stem of "öffnen" is "öffn-." Thus, the past tense form is "öffnete." This form is crucial for constructing grammatically correct German sentences that describe past events involving the act of opening.