Wir ehren den Lehrer.

Because Lehrer is the direct object of the sentence, so it takes the accusative case.

• der Lehrer = the teacher in the nominative case
• den Lehrer = the teacher in the accusative case

In Wir ehren den Lehrer, wir is the subject and den Lehrer is the person receiving the action.

Wir is in the nominative case because it is the subject of the sentence.

It means we and is the group doing the action of ehren.

ehren means to honor, to pay tribute to, or sometimes to respect in a formal sense.

It is a real and correct German verb, but it is a bit more formal and elevated than everyday verbs like:

• respektieren = to respect
• würdigen = to honor / appreciate formally

So Wir ehren den Lehrer sounds a little formal or ceremonial, like We honor the teacher.

The infinitive is ehren. With wir, the present-tense form is also ehren.

Present tense:

• ich ehre
• du ehrst
• er/sie/es ehrt
• wir ehren
• ihr ehrt
• sie/Sie ehren

So:

• Wir ehren = We honor

German main clauses usually follow the verb-second rule.

In Wir ehren den Lehrer:

1. Wir = first element
2. ehren = conjugated verb in second position
3. den Lehrer = object

This is the normal word order for a simple statement.

Yes. That is also correct German.

Den Lehrer ehren wir puts extra emphasis on den Lehrer. German allows this kind of word order change as long as the conjugated verb stays in the second position in a main clause.

So:

• Wir ehren den Lehrer. = neutral
• Den Lehrer ehren wir. = emphasizes the teacher

Because Lehrer is a noun, and all nouns in German are capitalized.

Examples:

• der Lehrer = the teacher
• die Schule = the school
• das Buch = the book

This is one of the most consistent spelling rules in German.

Traditionally, der Lehrer refers to a male teacher.

For a female teacher, you would usually say:

• die Lehrerin

Plural:

• die Lehrer = male teachers or a mixed group, depending on context
• die Lehrerinnen = female teachers

In modern German, you may also see gender-inclusive forms in some contexts, but der Lehrer by itself is grammatically masculine singular.

A helpful approximation is:

• ehren ≈ AIR-en

More precisely:

• the eh sounds like a long e sound
• the r in standard German is often soft or vocalized
• the final -en is usually a light ən

So Wir ehren den Lehrer is roughly:

• Veer AIR-en dain LAY-rer

That is only an approximation, but it can help at first.

Because wir is a pronoun, not a noun.

English also does the same thing:

• we honor the teacher not
• the we honor the teacher

So German uses:

• wir = we
• den Lehrer = the teacher

Only the noun phrase needs the article here.

Usually, no—not if you mean the teacher in this sentence.

• Wir ehren den Lehrer = We honor the teacher
• Wir ehren Lehrer would sound more like We honor teachers in a general sense, but even then German often prefers an article or clearer context.

So for this exact meaning, den Lehrer is the natural form.

No. Lehrer is not a weak noun in the special grammar sense.

It just happens that the noun itself stays the same in nominative and accusative singular:

• der Lehrer
• den Lehrer

The case difference is shown mainly by the article:

• der → nominative
• den → accusative

A true weak noun would add -n or -en in certain cases, such as:

• der Student
• den Studenten