týden

In a sentence

• Tento týden jsme měli spoustu práce.

  This week we had a lot of work.

  Here, 'týden' is used in the nominative singular form, indicating the specific week referred to as 'this week.'

• Strávil jsem týden na horách.

  I spent a week in the mountains.

  In this sentence, 'týden' is in the accusative singular form, serving as the direct object of the verb 'strávil jsem' (I spent).

• Kolik týdnů je v roce?

  How many weeks are in a year?

  'týdnů,' the genitive plural form of 'týden,' denotes a question about the quantity of weeks in a year.