講師は本題から脱線してしまった。の英語

The speaker wandered away from the subject.

The teacher called the roll.

The teacher distributed the question papers.

The professor gave a keynote speech on this theme.

The professor solved the problem at last.

The speaker paused and then went on talking again.

The professor disconfirmed the hypothesis.

The lecturer spoke on pollution problems.

The principal took it upon himself to explain.

I work as the lecturer of that course.

Even the teacher could not solve the problem.

The headmaster could not see the joke.

The teacher was sidetracked by questions on other subjects.

The lecturer would end up his speech with a joke.

The teacher's class was very interesting.

Our teacher touched the subject.

The teacher called the roll in class.

The professor seemed to be lost in thought.

The teacher's class was very fun.

The professor spoke thus.

The teacher gave a clear exposition of the theory.

Your lecture convinced me of my error―Your lecture opened my eyes （to my error）―Your lecture was an eye-opener.

The teacher sat on the chair.

Because the lecturer speaks quickly few people could follow him.

That teacher's class is very interesting.

Mr Takahashi gave us some homework.

Mr. Takahashi gave us some homework.

The professor has always been trailblazing in that field.

The teacher stood silent for a while, not knowing how to answer the question.

I never missed his lecture.