请问为什么take a bus加了a,而by bus没加冠词为什么?

请问为什么take a bus加了a,而by bus没加冠词为什么? take a/the number 2 bus take bus number 2 为什么后一句不用加 a/the take a/the number 2 bus 与 take bus number 2 take bus /take a bus/take the bus/take buses.1.take a bus和take the bus有什么区别?分别在什么时候用?2.例如“some students take buses to school”这bus要加es吗?如果加了,那中间要不要用the3.take bus 中间不加东西可 That must be a lot more fun than taking a bus. taking a bus 中的 take 为什么要加ing you can take a bus to go there为什么加to,为什么, take a yellow school bus.yellow为什么不在bus前 not all students take a bus to school,这句话not前为什么不加do? 是take a bus还是by a bus还是take the bus还是by the bus,为什么 【must i take a bus 】bus前面一定要加a吗 【must i take bus 】这样可以吗?如题 英语选择题 ___ a bus there will save plenty of time.A: To take B: Take请问为什么选A,麻烦讲解一下,谢谢___ a bus there will save plenty of time.A: To take B: Take take a bus还是take the bus为什么呢？我一般说take the bus但今天看见有许多人说 take a bus Taking a boat is a lot more fun than taking a bus.为什么第二个take要加ing? 乘地铁是为什么用take the subway而不用take a subway?表达乘地铁是为什么用take the subway,不用take a subway?而乘公共汽车是却用take a bus? The book store is far from here,you'd better (c) A.by bus B.on a bus C.take a bus D.in a busThe book store is far from here,you'd better (c)A.by bus B.on a bus C.take a bus D.in a bus既然选C了,为什么不能选A和D呢? take a 10 bus to I can take a bus I-can-take-a-bus. Let's__________(take)a bus.