في كل أسبوع أذهب إلى المكتبة مرة أو مرتين.

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Breakdown of في كل أسبوع أذهب إلى المكتبة مرة أو مرتين.

• الى: to
• يذهب: to go
• كل: every

Questions & Answers about في كل أسبوع أذهب إلى المكتبة مرة أو مرتين.

Why does the sentence begin with في كل أسبوع? Could I also say كل أسبوع?

Yes. كل أسبوع is very common and often the more natural way to say every week.

The version in your sentence, في كل أسبوع, is also understandable and means something like in every week / every week. Learners often notice the في because English does not always use a preposition here.

A simple way to think about it:

• كل أسبوع = every week
• في كل أسبوع = literally in every week

In many contexts, both work, but كل أسبوع is often shorter and more idiomatic.

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Why is أسبوع singular after كل? Why not a plural word like أسابيع?

After كل, Arabic usually uses a singular noun to mean every ....

So:

• كل يوم = every day
• كل أسبوع = every week
• كل شهر = every month

This is different from English, where learners may expect something like every weeks, but English also uses the singular after every. Arabic works similarly here.

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Why is the verb أذهب used? What exactly does it show?

أذهب means I go.