[shun]

Originally Posted by Whitemoon

Don't compare the week with the day, the hour, the year, the century and so on.
Don't compare the day with the week, the hour, the year, the century and so on.
When you compare the hour with the day, you will be complicated because you are sure to see that tomorrow is future time and next second is future time and you say "What is future time?"

My reply: This is to say, if I compare them, you cannot explain it, because you will be complicated by them.
This is to say, you can see by yourself clearly the fault of your explanation, even though it is the best you can define.
This is to say, you cannot tell the difference between the three of them correctly – the past, the present, and the future.

Why don't you suggest we should not explain time, because doing so will complicate us?
Why don't you suggest we should not open the forum, because it will allow us to ask questions and thus complicate English?

I cannot follow you and I will compare Week with Day as in the following.

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Originally Posted by Whitemoon

When we see the week, last week is past time, present week is present time and next week is future time.

My reply: Within the present week, there is Yesterday and Tomorrow, so the present time includes the past time and future time.

If you can explain time correctly and tell the difference, present time doesn't contain past time, and past time doesn't include future time, etc.

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If you fail to define present time, you cannot explain Simple Present, and you will have to use Meanings like "habit" to explain Simple Present. As any tense can express "habit", however, you cannot explain either Simple Present or "habit". Actually, you may claim Simple Present expresses other meanings like "love". It doesn't matter, as no one can deny it.

You cannot explain "habit" to the degree that we don't have past habit and future habit. Will you use Simple Present to say a past habit? No, certainly not. Even "used to" is a past tense. Then you will understand grammars have always made fool of you. Actually, as I have pointed out, Simple Present expresses only PRESENT habit.

Simple Present can express any kinds of meaning. Do you know of any meaning that cannot be expressed by Simple Present?