Duck_____and_____can swim in the river完整句子怎么写

Duck_____and_____can swim in the river完整句子怎么写 The litter boy can swim (swim swims )in the river Many boys___(swim)in the river now Look!They___(swim)in the river Many people_____(swim)in the river. Let them not swim in the river let's (swim) in the river They (swim;are swimming)in the river Are they---------(swim)in the river now? Can you swim in the river what about swim in the river? the boys don't swim in the river (用now做时间状语改写句子）