the school bus hasn'tcome yet the t____is always busy at this time of day

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• the school bus hasn'tcome yet the t____is always busy at this time of day
• the school bus hasn'tcome yet the t____is always busy at this time of day
• I'm unhappy that my father is always too busy at work to ______ me any time.
• This young man was very hard-working.He always continued to work through his break time andcomplained that those old folks were wasting time,having to break several times a day to drink and chat.这里always不是一般现在时吗?怎么后面接过去时?还有,最后一句having to----在句子中充当什么成分