i am being serious。 注: 在 there 和 here 引起的句子中, 常可用一般现在时代替现在进行时: here comes the bus。 =the bus is coming.) ( there goes the bell. (=the bell is ringing.) 在某些情况下两种情况都可 以用,没有多少差别: i wonder (am wondering) how i should answer then. does your leg hurt? (is your leg hurting?) it itches (is itching) terribly. my back aches (is aching). i write (am writing ) to inform you.