What is the difference between when and while

When guiding the temporal adverbial clause, including while, it is absolutely correct to use when. But there is a usage while when not, and that is table comparison.

whilewhen

The biggest difference is that the former refers to something that happens over a period of time.

The difference between when and while: different meanings, different usages, and different emphasis.

First, the meaning is different.

whenadv.When; When ..Time. conj.And then; But; When ..Time. pron.When; n.Time.

whileconj.When ..When; Though; Albeit; However. n.Spell; A while. v.Kill.

Second, the usage is different.

When is derived directly from the Old English word hwenne, which means when.

When can be used as a subordinate conjunction, to guide the adverbial clause, and to indicate time as "when...", in....When "solution; When expressing a condition, it is used as an "if, if" solution; When expressing contrast, it is used as a "since, take into account" solution. When the subject of the clause guided by when is the same as the subject of the clause, the subject, the verb or the auxiliary verb are often omitted, leaving only the substantive verb or predicate, or rewriting it as a phrase.

When the adverbial clause of time guided by means replaces the future tense with the simple present tense and the present perfect tense instead of the future perfect tense.

i was walking along the street when someone called me from behind.

I was walking down the street when suddenly someone called out to me from behind.

While is directly derived from the Old English word hwile, which means a period of time; Originally derived from Proto-Germanic, the adverbial clause that also leads to concessions, meaning "although, although", contains contrasting connotations.

While means "while, however", when it means contrasting relationships.

you don't want to marry while you are studying.

You are not allowed to get married during your studies.

Third, the focus is different.

When can be used as a conjunction to lead an adverbial clause that indicates time. When the leading clause is "dang.".time" or "every time....Solution, the action in the clause can occur at the same time as the action in the main clause, or before or after the action in the main clause.

While can be used as a conjunction to lead an adverbial clause that indicates time. While the guided clause is "dang.".or "in....Period", which emphasizes that the action in the clause occurs at the same time as the action in the main clause, but the duration is generally longer or the action of the main clause occurs during the action of the clause.

The biggest difference between while and as and when is that it sometimes contains the phrase "take advantage of..."The existence of the situation hurried to do something, otherwise it would be too late".

According to your description, (1) when can indicate both a certain point of time and a certain period of timeIn a when-guided temporal adverbial clause, its predicate verb can be continuous or non-continuous, and can occur at the same time as the predicate verb in the main clause or after it. (2) While can only represent a certain period of time, not a certain point of time.

In a while-guided temporal adverbial clause, its predicate verb can only be continuous, and it can only occur or exist at the same time as the predicate verb in the main clause. (3) The difference between when and while is also that the temporal adverbial clause guided by while is mostly used in the continuous tense, while the temporal adverbial clause guided by when is mostly in the general tense.

The mantra for the difference between when and while is as follows:

When means "......The verb in the clause guided by while is continuous. The differences are: different generations of laughter, different grammar, and different emphasis.

First, the reference is different.

1. when: when.

2. while: Although.

Second, the grammar is different.

1. when: The basic meaning of when is "when the limb collapses". It can be used as an interrogative adverb to ask when something has happened or will happen, leading to a special interrogative sentence.

2. while: while can also lead to a concession adverbial clause, which means "although, although", which contains contrasting meanings.

Third, the focus is different.

1. when: The predicate verb of the subordinate clause guided by when can be both a continuous verb and a short verb; The time when the predicate verb action takes place can be at the same time as the action of the main sentence predicate verb, or before or after.

2. while: The predicate verb in the while sentence should be a continuous verb, without a short verb, and the time when the predicate action occurs is usually the same as the time when the predicate verb action in the main sentence occurs.