Nick is always bustling about his job.always是一般现在时的标志为什么这里用了

Nick is always bustling about his job.always是一般现在时的标志为什么这里用了 Jean is always complaining about something.为什么不用一般现在时? 用适当的介词填空 Nick always brushes his teeth ____going to bed his father is reading a newspaper.(用always改为一般现在时） He is always complaining to me about his fate.为什么要加is? Mike is always worried about his mother's health worried为什么要 He ______ clean his room.如果是用always 那应该是 always is ,还是 is al always是哪个时态的标志词 He is always ______(worry) about his grades.要记住有be always do no people,except Mike and John,always ()...这里的动词是用单数还是复数?为什么 He is always the first to come to school.如果是一般现在时,为什么is会和alw always等一般现在时的标志词可以和be-v.ing一起用吗?