went to a park 为什么要加“a” went park 不行吗 请说明原因

went to a park 为什么要加“a” went park 不行吗 请说明原因 went to a park的音标是什么 Who went to a park yesterday?和Who did went to a park yesterd I went to (the) park yesterday.为什么加the __ a cold morning ,Ben went to the park went bike by to park I a (连词成句) l went to a park wath my family yesterday they went to a park 2 hours year I, went , to ,by ,park , a , bike 造句 went a park to Tom his with father ___did you go yesterday?l went to a park. His friends went to a park yesterday.改为否定句.