the boy is like a fish swimming in the river.其中有固定搭配吗

the boy is like a fish swimming in the river.其中有固定搭配吗 The fish ____(is /are)swimming in the river. Fish usually( ) fast in the river.A swim B is swimming c is _____ fish are swimming in the river. The boy is swimming( across the river). The boy swimming in the river is my friend Dave.(对swimming i I like swimming in the river .（把主语换成he ) There is a desk in Swimming in the river is dangerous 主语是Swimming吗 the fish are swimming 画线in the river 画线提问 The fish is swimming in the river.（对划线部分提问） there ___ little fish swimming in the river.填什么 is ,is some Is the boy ______ in the river?He's__________in the swimming