账单少了好几百——这笔开支他们为什么没记上？
Why didn't they record this expense? The bill is hundreds short.
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Why英 /waɪ/|美 /waɪ/
didn't英 /ˈdɪdnt/|美 /ˈdɪdnt/
They英 /ðeɪ/|美 /ðeɪ/
record英 /ˈrekɔːd/|美 /ˈrɛkərd/|英 /rɪˈkɔːd/|美 /rɪˈkɔrd/
解释
疑问词 why 引导过去否定疑问句，didn't 助动词与主语 they 倒装，动词 record 用原形。主语 they 区别于其他卡片的 you/he。
Why didn't they record this expense? The bill is hundreds short.
疑问词 why 引导过去否定疑问句，didn't 助动词与主语 they 倒装，动词 record 用原形。主语 they 区别于其他卡片的 you/he。