jiko de juutaishite ite, mokutekichi made ichijikan mo kakatta ndesu.

to be

Breakdown of jiko de juutaishite ite, mokutekichi made ichijikan mo kakatta ndesu.

• まで: limit particle
• 〜て いる: progressive form
• 〜て: connective form

Questions & Answers about jiko de juutaishite ite, mokutekichi made ichijikan mo kakatta ndesu.

What does 事故で mean here? Why is で used after 事故?

Here, で marks the cause/reason.

So 事故で means because of an accident or due to an accident.

In this sentence, it is not the location marker で. Japanese で has several uses, and one common use is to show a cause, especially for things like:

• 事故で = due to an accident
• 病気で = because of illness
• 大雨で = due to heavy rain

So 事故で渋滞していて means something like there was traffic congestion because of an accident.

What is 渋滞していて exactly? Is 渋滞 a noun or a verb?

渋滞 is a noun meaning traffic jam / congestion, but it can also be used with する as a verbal expression:

• 渋滞する = to be congested / to be backed up with traffic

From there:

• 渋滞している = is congested / is jammed
• 渋滞していて = being congested, and... / because it was congested...

So in this sentence, 渋滞していて is the て-form of 渋滞している, used to connect to the next part of the sentence.

Why is it 渋滞していて instead of 渋滞していた?