astonished是一个形容词，表示感到惊讶或震惊的意思。

音标：[əˈstɑːnɪʃt]

用法：通常用来形容人的情绪，表示对某件事或某人的行为感到非常惊讶或震惊。可以作为表语或定语使用。

例句：

1. I was astonished by his sudden change of attitude towards me.

我对他突然改变对我的态度感到很惊讶。

2. She looked astonished when she saw the amount of money in her bank account.

当她看到自己银行账户里的钱数时，她显得很吃惊。

3. The audience was astonished by the magician's incredible tricks.

观众们被魔术师令人难以置信的魔术表演震撼了。

4. We were all astonished at the news of her sudden resignation.

我们都对她突然辞职的消息感到震惊。

5. He was astonished to find out that his best friend had been lying to him all this time.

他他最好的朋友一直在欺骗他，这让他感到很吃惊。

同义词及用法：

1. surprised：意思相近，但surprised更多指轻微的惊讶，不如astonished强烈。

例句：I was surprised to see him here.

2. amazed：也表示惊讶，但更多指因为某件事而感到惊奇。

例句：I was amazed by her talent in singing.

3. shocked：意思为震惊，但更多指因为不好的消息或情况而感到震惊。

例句：I was shocked to hear about the accident.

4. astounded：强调极度的惊讶，比astonished更强烈。

例句：I was astounded by the beauty of the sunset.

编辑总结：

astonished是一个常用的形容词，表示感到非常惊讶或震惊的意思。它可以用来形容人的情绪，并且可以作为表语或定语使用。除了astonished外，还有一些近义词如surprised、amazed、shocked和astounded等，它们都有着类似的意思，但在程度上略有差别。当我们遇到令人吃惊的事情时，可以使用这些词来表达自己的感受。