暖气今天一直没热起来。
The heater hasn't been working properly today.
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hasn't英 /ˈhæznt/|美 /ˈhæznt/
been英 /biːn/|美 /bɪn/
working英 /ˈwɜːkɪŋ/|美 /ˈwərkɪŋ/
解释
hasn't been working 是第三人称单数现在完成进行时的否定缩写形式（has + not + been + working），表示从之前到现在设备功能一直不正常。
The heater hasn't been working properly today.
hasn't been working 是第三人称单数现在完成进行时的否定缩写形式（has + not + been + working），表示从之前到现在设备功能一直不正常。