What is the difference between for since? Illustrate.

For after the time period, and after the nce, add the specific time point.

eg：i've been learning english for three years,because i began learning it since three years ago.

I have been learning English for three years now, because I started learning English three years ago.

Interpretation: Three years is the time period, and three years ago is the point in time.

The difference in usage between for and since can be clearly illustrated by the following:

1."Since" is a preposition and adverb that refers to a specific point in time in the past and is used at the beginning of an event, action, or state. On the other hand, "for" implies the intended purpose of an action, but when it comes to time, it shows the amount, range, or duration of time something lasts.

2.Whereas, "for" denotes a specific period of time or duration, and "since" is used to denote a specific time.

3.When we use the word "since' to refer to a particular time, the verb used in the main clause is either in the present or past perfect tense, and the waning tense is either in the present or past perfect continuous tense. In addition, "since" cannot be used in the future tense.

On the contrary, the word "for" can be used for all space-time leaks.

1. Different usage.

Both of these words can be used in conjunction with words that denote time. Generally speaking, for is followed by a period of time (cumulative time) to illustrate how long something has been going on; Whereas, since is followed by a certain time (a point in time in the past) to indicate the time when something began.

2. The tone is different.

Both since and for have the meaning of "because".

However, as a coordinating conjunction, for has a weak tone, and the resulting sentence is generally placed at the end to indicate the reason for the explanation or the reason for the inference.

Since is slightly stronger than for and is generally used to mean "due to facts known to everyone".

3. The meaning is different.

Since means:

prep.Self-......Later; (expressing anger) He Zeng.

conj.Self-......Since; Because.

adv.Self-......Later; Thereafter; Before.

n.(since) (French, American) new (personal name).

for means:

prep.(Indication object, use, etc.) give, right; In order to; Concerning; Representative; Employed by; Meaning; In the tank; Because. To get;

conj.Because, due to.

abbr.Foreign; Forestry (forestry) <>

Since and for are different in terms of parts of speech, leading clauses, and lexical collocations.

First, the parts of speech are different.

1. Since can be used as a conjunction, preposition, and adverb.

2. for can be used as a conjunction or preposition.

Second, the subordinate clause of the guide is different.

1. Since is used as a conjunction for "since..."Since the later or, now" solution tense, leading the time adverbial clause.

2. for is a coordinating conjunction, which leads to a parallel clause.

Third, the vocabulary collocation is different.

1. After since, nouns and gerunds are often used as their objects.

2. for is often used after verbs, before nouns, and is often used in spoken language.

for + time period, since + time point, well, that's it...