Prepositions: BELOW & UNDER

source: Learn English with Alex [engVid]       2018年2月9日
Prepositions are hard to master in English. In this lesson, I talk about two very similar prepositions that often cause problems for English learners: "below" and "under". Should you say "He's below 21 years old" or "He's under 21 years old"? Are there situations where you can use both prepositions with no difference in meaning? The answer to the second question is YES, but there are situations where you must choose one or the other. To learn more about the similarities and differences between below and under, watch the video, then do the quiz at https://www.engvid.com/english-prepos... to check your understanding. I hope your score won't be below average!

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Difference between "under", "below", "beneath", and "underneath"

source: Learn English with Let's Talk    2014年5月7日
Take the test - http://www.learnex.in/whats-the-diffe...
These words are all similar in meaning, but figuring out the differences between them can be a little tricky. First, it's helpful to know how common each word is:
1. "Under" is the most popular.
2. "Below" is used about 1/4 as often as "under"
3. "Beneath" is used 1/2 as often as "below"
4. "Underneath" is used less than 1/2 as often as "beneath"
So if you're struggling to choose the correct word, "under" is probably the safest choice.

--Under
Compared to "below", "under" is more often used to talk about 3-dimensional objects. For example, you'd talk about something being under a table, under a book, etc.
# "Under" is also good for talking about layers of something:
I have on a t-shirt under my jacket.
# You can use "under" for numbers:
I did it in under 7 hours.
We were able to raise just under fifteen thousand dollars.
# "Under" also shows up in expressions like:
under stress
under pressure
under someone's control
under someone's influence
under consideration
under construction
under a spell

--Below
Compared to "under", you use "below" more often to talk about the level of something on a flat plane. For example, if you're describing two photos that hang on a wall, you can say that one of them is "below" the other.
# Use "below" to talk about the level of something, like a temperature:
It's supposed to drop below freezing tonight.
In writing, you can use "below" to talk about something later on:
Please read the instructions below before you begin.
The opposite of "below" is "above".

--Beneath
# "Beneath" is more formal than "under":
In the unlikely event of an emergency water landing, you may find a flotation device beneath your seat cushion.
It can also suggest being covered by something:
beneath the blankets
beneath the surface of the water
When you're talking about someone's actions or decisions, you use "beneath" to talk about the true emotions that a person is hiding:
Beneath it all, he still loves her.
When you're talking about human relationships, being "beneath" someone is very negative. Things or people that are "beneath" you are disgusting. They're too low for someone with your social position:
She acts like some kind of princess, like we're all beneath her.

--Underneath
# "Underneath" has a kind of casual and expressive feeling. You can choose "underneath" instead of "under" to explain the location of something with a little more emphasis.
A: You found it! Where was it?
B: It was underneath the sofa.
Think of "underneath" as a more emotional, exciting version of "under".