follow through on,come thrpugh for,stop/drop by

follow through on,come thrpugh for,stop/drop by call on ,drop by和come的区别 drop by,drop on和drop in Unacceptable follow-through on assignments. drop by on sb. drop by 和come over drop by 和 drop on的区别 come over 和 drop by 的区别 drop by =come over吗? come through for 什么意思? through,by,on的区别 drop in on 与drop by有什么区别