1. ago 表示“現在的多長時間以前”,常與過去時連用
It happened quite some time ago.
那是很久以前的事.
2. before 表示“過去某時的多長時間以前”,常與完成時連用
He made a statement before the House of Commons.
他在下議院當眾發表了一個聲明。
3. anxiety for/to do 想得到……,想做……
His anxiety for knowledge is to be praised.
他對知識的渴應該受到稱贊。
4. with anxiety 焦慮地
He was tortured with anxiety.
他因慮而苦惱。