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They're usually referring to Options
Jigneshbharati
Posted: Monday, December 10, 2018 5:22:36 AM
Rank: Advanced Member

Joined: 11/3/2016
Posts: 3,409
Neurons: 17,823
When wildlife biologists talk about moles, they’re usually referring to the tiny, gray rodents that dig underground to find delicious earthworms. But when chemists talk about moles, they’re usually referring to a scientific term. The term ‘mole’ represents a number, in the same way the word ‘dozen’ represents 12 of something. In this case, one mole represents the enormous (and slightly strange) number, 6.02 x 1023.
https://www.visionlearning.com/en/library/Chemistry/1/The-Mole-and-Atomic-Mass/53
Please explain the use of present progressive in "they are usually referring to..."
why can't we use present simple "they usually refer to...
thar
Posted: Monday, December 10, 2018 5:46:44 AM

Rank: Advanced Member

Joined: 7/8/2010
Posts: 22,414
Neurons: 90,814
You already have one habit.

"When chemists talk about moles..."

What is actually happening, in those in instances when they say that word?
Each time they talk about moles, they are doing something specific. They are referring to an amount.


If it were present simple, it would be a habit within a habit.
When I talk about moles, I scratch my nose.
That is a habit, that happens every time. Habitually, I scratch my nose every time I talk about moles.

But
When I talk about moles, I am referring to an amount, not an animal.
That is the thing that I am doing at that particular point in time.
That is the thing that I am referring to.

The meaning of 'when' includes the meaning of 'every time'. And to refer to something is not the habit - it is the action that occurs.
It is not a habit to refer to an amount, every time I talk about moles.
What I am doing, every time I talk about moles, is referring to an amount. I am not referring to an animal at that time.
Jigneshbharati
Posted: Monday, December 10, 2018 5:55:01 AM
Rank: Advanced Member

Joined: 11/3/2016
Posts: 3,409
Neurons: 17,823
Thanks
Helenej
Posted: Monday, December 10, 2018 6:04:16 AM

Rank: Advanced Member

Joined: 9/24/2013
Posts: 2,143
Neurons: 10,538
Location: Kiev, Kyiv City, Ukraine
Great explanation, thar. At least I got everything. Applause
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