Twice English words are once, twice English words are twice and twice. The British pronunciation of once is [w? ns]； The American pronunciation is [w? Ns], as a noun, means once, once, once and twice.

The British pronunciation of "twice" is [twa? s]； The American pronunciation is [twa? S], as an adverb twice, twice; Twice; Much better. Wait.

The British pronunciation of double is ['d? bl]； The American pronunciation is ['d? Bl]. As an adjective, the meaning is twofold; Pairing; Double. Being a verb means doubling; Twice ... as a noun means twice; Double.

Extended data:

Word parsing:

First, once

1, usage:

Conj。 (conjunction)

1)once, when used as a conjunction, can guide adverbial clauses of time and conditions. When used in the former, it means "once ……", and its leading clauses are many and short; When used in the latter, it means "as long as". This conditional clause seems to have the meaning of time conditions.

2)2) Some parts of the primary leading clause can be omitted.

2. Example:

Used as an adverb

Once or twice, she looked back at me.

Once or twice she looked back at me.

She didn't say a word to him all night.

She hasn't said a word to him all night.

The second time, twice

1, usage:

adverb

Twice means "twice, twice" and can modify static verbs, dynamic verbs, adjectives, nouns, numerals or other adverbs in sentences.

2. Example:

Used as an adverb

I am more than twice his age.

I am more than twice his age.

The length of this table is twice the width.

The length of this table is twice the width.

Third, double it.

1, usage:

(adjective)

1)double as an adjective basically means "double", and the nouns it modifies are generally singular.

2)double is often used to express multiples, followed by nouns, numerals and pronouns. Sometimes the definite article the or possessive pronouns can be used between double and modifier nouns.

(noun)

The basic meaning of double as a noun is "double, double", and it can also be extended to "very similar person", "body double" and "double bet in horse racing"

It can also refer to "doubles" such as tennis, generally in the plural form; It can also refer to "winning the second prize" in similar competitions, generally in singular form, preceded by a definite article.

2. Example:

Used as an adjective

This date has a double meaning.

That day has a double meaning.

This machine has a dual purpose.

This machine has a dual purpose.

References:

Baidu encyclopedia-once

Baidu Encyclopedia-Twice

Baidu Encyclopedia-Double