sth is shown和sth is showing有什么不同

sth is shown和sth is showing有什么不同 sth is be on sth is better believe sth.is sth.,and is sth.和 sth.is sth.,and it is sth.哪个正确?（sth.= something）如题,请问上述两种说法哪一个是正确的表述 it is time for sth造句it is to do sth 造句和want to do sth,it is time for sth造句 it is time to do sth 和it is time for sth有区别么 Whose is this sth.和 Whose sth.is this?有什么区别? there is sth to do和there is sth doing 的区别 It is time to do sth和It is time for sth有区别吗? sth.is expected和sth.is to be expected的区别 sb.is up to sth. sb.is up to sth. is he do/dong sth? she is sth.with sb. sth is after you是什么意思? sb face sth和sb is faced with sth用法的区别是什么啊? it difficult to do sth 和it is difficult to do sth 的区别 it is possible to do sth和it possible to do sth谁是正确的