He had to extemporize because he had forgotten to bring his notes.是什么意思？

He had to extemporize because he had forgotten to bring his notes.

他因为忘了带讲稿,只好即席发言.

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

extemporize

vt. 即兴创作，即席演奏；

例句
He had to extemporize because he had forgotten to bring his notes.
他因为忘了带讲稿,只好即席发言.

because

conj. 因为；

例句
5,000 people die every year because of accidents in the home...
每年有5,000人死于家中的意外事故。

forgotten

v. 忘记( forget的过去分词 )，不再想，忘记做（或带、买等），不再考虑…的可能；

例句
Alex had forgotten to charge the battery.
亚力克斯忘了给电池充电。

bring

vt. 带来，引来，促使，引起，提供，导致；

例句
He has the ability to bring out the best in others.
他能做到扬人之长。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

notes

vt. 记下，对…加注释；n. 注意( note的名词复数 )，笔记，单音，特征；

例句
He wrote a few more notes on the board.
他在黑板上又写了几条注释。