私はその講義が全く理解できなかった。の英語

I couldn't take in the lecture at all.

The lecture was beyond me.

The lecture was above me.

The lecture was beyond my comprehension.

I wasn't able to understand the subject of that conversation.

I wasn't able to understand the details of that conversation.

I concentrated my attention on the lecture.

I concentrated my attention on the lecture.

That lecture really stimulated me.

I want to take that lesson.

I am going to take that lecture.

I needed to take that lecture for that reason.

The lecture was very long, but I enjoyed it none the less.

I couldn't understand what he was talking about at all.

There are mostly no students that can understand my lecture.

His explanation was quite above me.

I couldn't understand her explanation.

You can not understand him, unless you are used to him.

I ought to have attended the lecture.

His speech made no sense to me.

I was not able to understand everything in everyone's conversations.

I caught the first part of the speech but not all of it.

I could make nothing of his explanation.

His explanation was incomprehensible to me.

I could not catch her words.

Your lecture is difficult.

On hearing your lecture, my doubts have all been resolved―my doubts have all been dispelled―（他動詞構文にすれば）―Your lecture has resolved all my doubts―dispelled all my doubts―satisfied all my doubts.

I couldn't get the point of his speech.

I couldn't understand what he was saying.

When he lectures, I cannot follow