play加ing就是进行时（什么时候正在做某事）；例：I am playing basketball.我正在打篮球。1、play前面有be动词，play后面加ing,play在句子里面作为动词，且句子主语动词加ing做谓语情况做谓语时动词加ing前面必须加上be动词，形成be+动词ing(现在分词)作句子谓语，构成进行时态句子。例如：He is reading a book now. 他正在
╯０╰ 做宾语的动词要加ing(动名词);一些固定句式后面要加动词ing(现在分词);动词修饰名词做后置定语时，要加ing(现在分词);动词做主语和表语时，动词要加ing(动名词)。动词加ing的一、动词加ing做谓语情况做谓语时动词加ing前面必须加上be动词，形成be+动词ing(现在分词)作句子谓语，构成进行时态句子。例如：He is reading a book now. 他
做谓语时动词加ing前面必须加上be动词，形成be+动词ing(现在分词)作句子谓语，构成进行时态句子。例如：he is reading a book now.他正在看书. he was watching 做谓语时动词加ing前面必须加上be动词，形成be+动词ing(现在分词)作句子谓语，构成进行时态句子。例如：He is reading a book now. 他正在看书. He was watchin
4动词前有部分介词。例：She is looking forward to seeing him.5有些动词加ing变为形容词。例：exhaust（动词：耗尽精力）加ing为exhausting（形容词：精疲力尽1.动词作介词的宾语要加ing。I'm looking forward to seeing you again.我期盼着再次见到你. The boy is so excited about hearing from his mother.男孩为收到他妈妈的来信很兴
∩﹏∩ 1、动词作介词的宾语要加ing(动名词)I'm looking forward to seeing you again.我期盼着再次见到你.The boy is so excited about hearing from his mother.男孩为收到他妈妈1．英语动词加-ing,通常是在原形词尾直接加-ing构成：cough—coughing,climb—climbing,stand—standing,fight—fighting 2．以-e结尾的动词
