1. come along=come on， hurry up表示“快来”“快点”，表示催促、鼓动的语气时三个词都位于句首。

Hurry up, boys! They are waiting for us over there.

2. 表示“一起来”“一道来”

He came along with his friends.

这里come along不能改为come on。

3. 表示进展，类似还有get on, get along等

How are you coming along with your work?

come from表示“来自”“起源于”“出生于（某地、某家庭）”，与be from相近，还有come of。

He came from Shaoxing yesterday.他是昨天从绍兴来的。

表示来自某地用过去时，表示出生于……要用一般现在时。

She comes from Shaoxing.她出生于绍兴。
Where do you come from?=Where are you from?

1. come out（of）出来，显现，开放，不能搭配from，表示从……出来，同样的还有take out of。

He came out of the classroom and went to the playground.
Please take your excercise-book out of the school-bag.

2. 出版

The book will soon come out.

1. 上来，上楼

I’m still in bed. Can you come up and see me?

2. 走近、靠近

come up to+宾语，run up to同

A child came up to me and asked the way.一个小孩走过来，向我问路。