三十的英语怎么写

How to Write Thirty in English

The word "thirty" is the written form of the number 30 in English. It is a cardinal number that follows the number 29 and precedes the number 31. In this article, we will look at how to write and use the word "thirty" correctly.

To start, let's take a look at the spelling of the word "thirty." The word is spelled as "t-h-i-r-t-y" with a 't' at the beginning, followed by 'h', 'i', 'r', 't', and 'y'. Remember to use lowercase letters unless it is at the beginning of a sentence.

When to use "thirty":

1. Quantity: "Thirty" is used to represent the quantity of 30. For example, "There are thirty students in the classroom."

2. Age: "Thirty" can be used to indicate someone's age. For instance, "She celebrated her thirtieth birthday last week."

3. Time: "Thirty" can also be used to indicate time, such as "half past thirty" to represent 30 minutes past the hour.

Here are a few examples that demonstrate the correct usage of "thirty" in different contexts:

- There are thirty days in September, April, June, and November.

- He bought thirty apples at the grocery store.

- It took her thirty minutes to finish the race.

- She plans to retire when she turns thirty.

It's important to note that "thirty" is not hyphenated; it is written as a single word. Additionally, "thirty" is an adjective in English, so it should be used to modify nouns.

In conclusion, "thirty" is the written form of the number 30 in English. It is spelled as "t-h-i-r-t-y" and is used to represent a quantity of 30, someone's age, or indicate time. Remember to use "thirty" without hyphens and as an adjective when modifying nouns.

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The Proper Writing of the Age of Thirty in English

When writing the age of thirty in English, it is important to follow the standard writing format and use the correct numeral and word. In English, numbers from zero to nine are usually written as words, while numbers from ten and above are written as numerals. However, there are some exceptions, and the age of thirty falls into one of them.

To write the age of thirty in English, the numeral "30" is used instead of writing it out as "thirty". This follows the general rule of using numerals for numbers of two digits or more. For example, we write "27" instead of "twenty-seven" and "42" instead of "forty-two". Therefore, the proper way to write the age of thirty is "30".

It is worth noting that when the age of thirty is used as an adjective before a noun, it is written as "thirty-year-old". In this case, the word "old" is added after the numeral and hyphens are used to connect the words. For example, we would write "a thirty-year-old woman" or "a thirty-year-old company".

In conclusion, when writing the age of thirty in English, the numeral "30" is used. However, when used as an adjective before a noun, it is written as "thirty-year-old". It is important to follow these guidelines to ensure accurate and proper writing in English.