她当时没有在看书，只是盯着窗外发呆。
She was not reading the book; she was just staring out of the window.
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was英 /wɒz/|美 /wɑz/
not英 /nɒt/|美 /nɑt/
reading英 /ˈriːdɪŋ/|美 /ˈridɪŋ/
解释
was + not + reading 构成过去进行时否定式，否定了她正在阅读的状态，与后文肯定式 was staring 形成对比。
She was not reading the book; she was just staring out of the window.
was + not + reading 构成过去进行时否定式，否定了她正在阅读的状态，与后文肯定式 was staring 形成对比。