Question

6．所有座位都坐满了人，我们只好站着观看演出．（oblige）All the seats were occupied/taken up，so we were obliged to stand to watch the performance．．

Answer 1

分析 All the seats were occupied/taken up，so we were obliged to stand to watch the performance．

解答 All the seats were occupied/taken up，so we were obliged to stand to watch the performance．
本句是对过去行为的一种描述，根据句意"都坐满了人，我们只好站着"可知，用一般过去时．
本句为主从复合句，后面为so引导的结果状语从句，to watch the performance为不定式作目的状语．be occupied/taken up被占用，被占据；be obliged to do sth被迫做，不得不做．

点评 本句中be obliged to do sth的常用表达为have to do sth；要比have to do sth更形象、生动贴切．
 I felt obliged to leave after such an unpleasant quarrel．发生了这样不愉快的争吵之后，我觉得有必要离开．
They were obliged to sell their house in order to pay their debts．他们被迫卖房还债．