1. From indicates a source.

Pattern 1: verb + from + noun
Tony is from Alabama.
I hear from him every week.

Verbs commonly used before from:
be, call, come, derive, hear

Pattern 2: verb + noun + from + noun
We get help from our neighbors.

Verbs commonly used with this pattern:
borrow, bring, buy, collect, copy, get, mail, obtain, receive, send

2. From indicates a point of departure.

Pattern: verb + from + noun (place)
The ship sailed from San Francisco.
Please start from the beginning.

Typical verbs:
begin, depart, drive, fly, go, graduate, move, read, sail, start (over), take off

3. From can indicate separation.

Pattern 1: verb + away + from + noun
We ran away from the building.
Keep away from the crowd.

Typical verbs before away from:
drive, get, keep, move, run, walk

Pattern 2: verb + noun + from + noun
We collected the papers from the students.

Verbs commonly used with this pattern:
borrow, buy, chase, collect, delete, dissociate, eliminate, erase, expel, hide, keep (away), protect, release, remove, save, scare (away), separate, shield, steal, subtract, take (away)

4. From can indicate difference.

Pattern 1: number + from + number
Three from nine equals six.

Pattern 2: number + noun of time of distance + from
He lives five miles from here.
They are only twenty minutes (away) from the city.
I will see you two weeks from today.

Expressions:

be different from
My sweater is different from yours.

Simple Science

How to produce Rainbow Colors

Color:
The Spectrum. If a beam of sunlight is admitted into a dark room through a narrow opening in the shade, and is allowed to fall upon a prism, as shown in Figure, a beautiful band of colors will appear on the opposite wall of the room. The ray of light which entered the room as ordinary sunlight has not only been refracted and bent from its straight path, but it has been spread out into a band of colors similar to those of the rainbow.

Whenever light passes through a prism or lens, it is dispersed or separated into all the colors which it contains, and a band of colors produced in this way is called a spectrum. If we examine such a spectrum we find the following colors in order, each color imperceptibly fading into the next: violet, indigo, blue, green, yellow, orange, red.