My teacher seems (have) a problem these days.用所给单词的适当形式完成下列句子

My teacher seems (have) a problem these days.用所给单词的适当形式完成下列句子
My teacher seems to be having a problem these days.
seem to do sth 似乎要做某事
seem to be doing sth 似乎一直在做某事为什么不用 to have啊根据these days“近几天”，我们得知：“是近几天【一直】有一个难题”。