jugyougo, sonomama toshokan ni ikimasu.

destination particle

Breakdown of jugyougo, sonomama toshokan ni ikimasu.

• 行いく: to go
• 図書館としょかん: library

Questions & Answers about jugyougo, sonomama toshokan ni ikimasu.

Why is 授業後 one chunk? Why isn’t there a particle between 授業 and 後?

授業後 is a set expression meaning after class.

• 授業 = class / lesson
• 後（ご / あと） = after

Here, 後 is attached directly to the noun to make a compound noun:

• 授業後 = after class
• 食後 = after a meal
• 放課後 = after school

So there is no particle between 授業 and 後 because they form one expression.

A similar alternative is 授業の後, which also means after class. That version is a little more transparently grammatical for beginners:

• 授業の後、そのまま図書館に行きます。

Both are natural.

What does そのまま mean here?

In this sentence, そのまま means something like:

• just like that
• without doing anything else first
• straight
• right away

So the nuance is:

After class, I go straight to the library
or
After class, I go to the library without stopping anywhere else first.

It often suggests that no change or interruption happens in between. For example, the speaker does not go home first, does not change plans, and does not stop somewhere else.