on boat,on the boat,by boat各是什么?有什么区别吗?

a boat on the boat on the Kunming Lake in the boat和on the boat 谁对 谁错? on boat,on the boat,by boat各是什么?有什么区别吗? there is no boat on the l------. 是on the dragon boat festival还是at the dragon boat festival?到底是哪个？！！！ 是on the dragon boat festival还是at the dragon boat festival? There is hardly any boat on the river为什么boat用单数 look at that man.he is_______(boat)on the river. on sundays,we often go (boat)in the park look!There is a boat on the ( r------ ) the dragon boat festival is on lunar may There are teo ducks and a boat on the river. 翻译You may sit on either side of the boat. We rowed a boat on the lake .翻译 We ___(boat) on the lake next Sunday We often go____ on the lake.(boat)怎么填啊? I rowed a boat on the lake there.