I'm smiling she's smilinghe's smilingXX be smiling .
am/is/are smiling,正在进行时
什么句型呢？如果是他正笑着进来这样的句型，那么就用He is coming with a smile (on his face)如果就只是正在微笑，那就是一楼和二楼说的了
he is smiling
