expert at opening 造句用这个造句,限3分钟

expert at opening 造句用这个造句,限3分钟 soon became an expert at opening the gate 句型转换soon （） （） （ ）opening the gate soon became an expert at opening the gate 句 型转换soon （） （） （ ）opening the gate Rex soon became an expert at opening the gate,at后可以用不定式吗?为什么用-ing become an expert at 与become expert at 与在新概念第二册的Lesson 59与Lesson 94中出现了,Rex soon became an expert at opening the gate与children become expert at holding their breath under water even before they can walk.其中expert前 用expert造句 so expert that造句 be expert in与be expert at 的区别 expert at/on/in 有什么区别 be expert at doing 还是in doing 请分析下这两个英语句子的成分I spent two weeks in reading this book.请问 this book在句子中是作reading的宾语补足语吗?Rex soon became an expert at opening the gate.请问opening是动名词还是现在分词,作什么成分, 是be an expert in/at/on ,还是be expert in/at/on? be expert at与be good at,be expert in与be good in, expert用法expert后面带介词in,at,on,有什么区别啊? 英语翻译这里的opening up,at work Opening 求翻译：她擅长画画 (be expert at) be expert at和excel in的用法