直到看了手表，他才意识到已经这么晚了。
He didn't realise how late it was until he checked his watch.
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didn't英 /ˈdɪdnt/|美 /ˈdɪdnt/
realise英 /ˈrɪəlaɪz/|美 /ˈriəlaɪz/
解释
didn't 是助动词 do 的过去式否定形式，后接动词原形 realise，构成一般过去时的否定句。
He didn't realise how late it was until he checked his watch.
didn't 是助动词 do 的过去式否定形式，后接动词原形 realise，构成一般过去时的否定句。