1.reach是及物动词，后可直接加地点名词或地点副词做宾语。现在分词，过去式，过去分词如下：reach-reaching-reached-reached。

例如：I will call you as soon as I reach

Beijing.我一到北京就给你打电话。

She reached there yesterday.她昨天就到了那儿。

2.get 是不及物动词。后可直接加地点副词做宾语，加地点名词做宾语时必须家加介词to,即get to。现在分词，过去式，过去分词如下：

get-getting-got-got/gotten。

例如：I will call you as soon asI get to

Beijing.我一到北京就给你打电话。

She got there yesterday.她昨天就到那儿了。

3.arrive是不及物动词。后可直接加地点副词做宾语，加地点名词做宾语时必须家加介词in,at,on。即arrive in到达某个区域，往往指大地方，arrive at到达某个地点，即往往指小地方。arrive on 到达某个现场。现在分词，过去式，过去分词如下

arrive-arriving-arrived-arrived。

I will call you as soon as I arrive in Beijing.

我一到北京就给你打电。

I will call you as soon as I arrive at the bus station.我一到你车站就给你打电话。

Tom was the second person who arrived

on the scene. Tom是第二个到达现场的人。

She arrived there yesterday.她昨天就到那儿了。

总之，reach sp（名词）=get to sp（名词）

=arrive in/at /on sp（名词）。

reach sp（副词）=get sp（副词）=arrive sp（副词）。