nemukute sofa de sonomama nechatte, shukudai o dasuno o wasureta.

I was sleepy and ended up falling asleep on the sofa, and I forgot to turn in my homework.

Breakdown of nemukute sofa de sonomama nechatte, shukudai o dasuno o wasureta.

• を: direct object particle
• で: location particle
• 宿題しゅくだい: homework
• 〜の: verb nominalizer

Questions & Answers about nemukute sofa de sonomama nechatte, shukudai o dasuno o wasureta.

Why is 眠い changed to 眠くて?

眠くて is the -te form of the i-adjective 眠い.

For i-adjectives, you usually make the -te form by changing -い to -くて:

• 眠い → 眠くて
• 高い → 高くて
• 忙しい → 忙しくて

Here, 眠くて links to the next action and gives a reason/background sense:

• 眠くて、ソファでそのまま寝ちゃって…
• I was sleepy, and so I ended up falling asleep on the sofa…

So it is not just “sleepy and…” mechanically; it often feels like “because I was sleepy…” or “being sleepy, …”.

What does ソファで mean here, and why is で used instead of に?

Here, で marks the place where an action happens.

• ソファで寝る = sleep on the sofa

Japanese often uses で for the location of an activity/action:

• 学校で勉強する = study at school
• 公園で遊ぶ = play in the park

A learner may expect に because sleeping can feel like a state, but in everyday Japanese, 寝る commonly takes で when talking about the place where someone fell asleep or slept.

So:

• ソファで寝ちゃって = ended up falling asleep on the sofa

What does そのまま mean in this sentence?