我看着他们游泳 I watch them swim ; I looked at their swimming

当他们游泳时 When they are swimming

然后看他们游泳 And then watch them swim

他们在游泳 They are swimming

他们是游泳 They are swimming

我希望他们会游泳 I hope they can swim

他们以前害怕游泳 Their beforehand fear swimming ; They afraid to swim ; They were afraid before swimming

他们打算去游泳 They planned swims ; They intend to go swimming

他们正在游泳池里游泳 They are swimming pool ; They are swim swimming pool