Work on it had begun before my sister left.
这栋房子在我姐姐离开之前就已动工了，
新概念英语第二册 Lesson 23 A new house

📚 句中词汇解析

从本句中提取的重要词汇

work [wɝk] 词频1
vt.& vi. 使工作;使运作;操作;使产生效果; n. 工作，操作;著作;工厂;行为，事业; vt. 使工作;操作;经营;使缓慢前进;
"to be absent from work"
缺勤
近义：labor, labour, function, process, tool, malleate 反义：idle, laze, loaf, loiter, ramble, roam
sister ['sɪstɚ] 词频1
n. 姐妹;（称志同道合者）姐妹;修女;护士; adj. 姐妹般的;同类型的; v. 如姐妹般相待;
"Mr Darcy's affection for his sister"
达西先生对他妹妹的关爱之情
近义：sibling, sis, nun, sisterly
left [lɛft] 词频1
adj. 左边的，左侧的;左派的; n. 左，左面;[军]左翼;左派，激进分子; adv. 向左;在左边; v. 离开( leave的过去式和过去分词);
"He left school at the age of 18."
他18岁读完中学。
近义：nigh, leftover, pending, remaining, remanent, residual 反义：lacking, short
begun [[bi'gʌn]] 词频1
begin的过去分词

📚 更多「新概念英语第二册」例句

I looked at my watch.It was true.
我看了一下我的手表，果真如此。
I had nearly reached the town, when the young man suddenly said, very slowly, Do you speak English?'
“你会讲英语吗？”
Dan Robinson has been worried all week.
丹。鲁宾逊焦虑了整整一个星期。
I sat down on one of those modern chairs with holes in it and waited.
我坐在一个新式的满是网眼儿的椅子上，等待着。
A robot-arm from the Endeavour will grab the telescope and hold it while the astronauts make the necessary repairs.
当宇航员进行必要的修复工作时，“奋进”号上的一只机器手将抓住望远镜并托住它。
decided to take some presents to a children's hospital.
盖茨决定送些礼物给儿童医院。