it was not until that..“It is / was not until … that …”.译作“直到…才…”,它是“not … until …”的专用强调句型.如 It was not until she arrived in class that she realized she had forgotten her bo...什么时候用when强调句的引导词没有加when的，但是，在被强调部分倒是有。比如It was when I came into the room that he started to cry.是当我走进房间的时候他才哭的。