【正文】
一律用that。如:It was under the bed that my brother hid the ballthis morning.It is Mr Bell who/that often es and looks afterthe old man.9.It is/has been+一段時(shí)間+since從句。如:It is /has been three years since we saw each otherlast.10.It is (high) time that sb. did sth.該句型表示“某人現(xiàn)在該做某事了”,從句常用過(guò)去時(shí)(虛擬語(yǔ)氣)說(shuō)明現(xiàn)在應(yīng)該做的事情。如:It’s six o’clock.It is high time that we went homenow.