他们本来打算来看我们，但他们的航班取消了。
They were going to visit us, but their flight was cancelled.
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were英 /wɜː/|美 /wər/
going英 /ˈɡəʊɪŋ/|美 /ˈɡoʊɪŋ/
to英 /tuː/|美 /tu/|英 /tə/|美 /tə/
解释
were going to + visit：复数主语 they 搭配 were，结构完整表达过去的计划，but 引出计划取消的原因。
They were going to visit us, but their flight was cancelled.
were going to + visit：复数主语 they 搭配 were，结构完整表达过去的计划，but 引出计划取消的原因。