Usage of ONCE for help 5

It's very comprehensive, so I don't need to add it, ha.

The usage of once is summarized as follows:

Used as an adverb to mean "once", it is an adverbial that imitates jujube, usually at the end of a sentence, and sometimes at the beginning of a sentence. once he made bold to ask her to accompany him to a party.Once, he plucked up the courage to ask Skinny to accompany him to a party.

It means "once" or "once", which is an adverb that indicates an indefinite time, usually before an action verb, after a special verb (auxiliary verb, modal verb, verb be), and sometimes at the beginning of a sentence. once there stood an old church on the hill.There used to be an ancient church on the hill.

It is used as a conjunction to guide the adverbial clause of time, and it should be noted that the clause should be used to express the future meaning in the present and ready Qi dismantling in the tense. once you let him start talking,there was no stopping him.Once you get him to talk, you can't stop him.

In the case of the leading clause, the subject can sometimes be used to omit the structure if it is consistent with the subject of the clause, and the omitted part usually (but not always) includes the verb be.

There are three ways to use once; Adverbs, conjunctions, nouns, when used as loose adverbs, means "once; Once", when used as a conjunction, it means "once", and when used as a noun, it means "once, once".

1. Once is used as a conjunction to mean "once ......Just ......It is used to connect temporal adverbial clauses, which is equivalent to as soon as.

Example: Once you start, you will never give upOnce you've started, don't give up.

2. When once is used as an adverb, it means "was; Once; Once upon a time". It is an indeterminate adverb of time, and its position is generally before the action verb and after the verb. Example:

once he lived in america, but now he lives in england.He used to live in the United States, but now he lives in the United Kingdom.

3. Once is used as an adverb, which can also mean "once". Two times is "twice", three times is "three times", and four times is "four times". Example:

the old professor comes to see us once a week.The old professor came to see us once a week.

4. When "once + past participle" is used as a postposition, it can be understood as "if once......" has the meaning of a conditional clause. Example: such a thing once seen will always be remembered

If you see this kind of thing, you will always remember it.

once is a phrase

1 at once ( ) right away).

finish the task at once.

Please complete the task now.

2 once again (again; Again), equivalent to once more.

read the passage once more.

Read the text again.

3. once in a while; Companion Dust Room or).

we went to see our english teacher once in a while.

We went to see our English teacher occasionally.