比如a meal cooked by experts为什么不用is cooked ...额.老师上课的时候偶然说的这个句

新概念中这句话为什么火前用冠词a?原句They cooked a meal over a open fire. we ate great meals cooked by experts是什么句式 we ate great meals cooked by experts啥意思 home cooked meal she cooked the whole meal by herself.为什么用by,能否省略?反身代词什么时候用by she cooked the whole meal by herself,为什么用by,能否省略?什么情况下用by A child likes food unless it is badly cooked.The way a meal 上下文是：I cooked a chinese meal last night!.and everyone is sti His father cooked a meal yesterday.对cooked a merl划线部分提问 they cooked a meal over an open fire. This kind of food is cooked by a cook_Jack.填calls还是called? 1.My mother cooked a delicious meal.After meal,we watched TV