Englishfor English speakers
protection
Noun
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Protection is keeping something or someone safe.
She ran away from her abusive husband to her brother for protection.
—
A device used for safe sex e.g. condom.
I used protection so I wouldn't get her pregnant.
of
Preposition
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Made using.
It is a house of cards.
know
Verb
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When you know something, you have facts or ideas in your mind.
I knew more things after I went to school.
I know a little Spanish.
I think I can do it, but I don't know.
—
You know a person, if you have met him or her.
Yes, I know John. I met him in class last week.
We want you to know that it will be OK.
how
Adverb
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The word "how" is a question word, to ask about the way something happens or the way people do things.
How will we ever solve this problem?
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The word "how" is used to tell about the way something happens or the way people do things.
I know how we can solve this problem?
This is how to make this machine work.
—
used to show that you feel strongly about something.
How old he looks!
how
Subordinator
—
You use how to tell that something happens, is done, or is true.
She told him how it wasn't fun anymore.