Breakdown of Er verabscheut es, schweigend im Stau zu stehen.
er
he
es
it
stehen
to stand
im
in the (used with months) / in the (contraction of in + dem)
Questions & Answers about Er verabscheut es, schweigend im Stau zu stehen.
Why do we need es after verabscheut? Can I just leave it out?
The es acts as a placeholder (Korrelat) for the entire infinitive clause that follows. Because the verb verabscheuen (to despise) requires a direct object, es steps in to fill that grammatical slot in the main clause. While the placeholder es is optional with some verbs, with verabscheuen it is mandatory.
Is the comma before schweigend mandatory here?
Yes. In German, when an extended infinitive phrase (an infinitive with zu plus other words) is anticipated by a placeholder word like es in the main clause, you must use a comma to separate the clauses.
How is schweigend formed, and why doesn't it have a declension ending?
schweigend is the present participle of the verb schweigen (to be silent), formed simply by adding -d to the infinitive. Here, it is used as an adverb describing how he stands in the traffic jam. Because it acts as an adverb rather than an adjective placed directly in front of a noun, it takes no declension endings.
As a quick refresher, why do we use the dative im Stau here rather than the accusative?