The distinction and usage of th, nd, and st after the date:

If the date ends with 1: 1, 21, 31 are followed by st (abbreviation of first); if the date ends with 2: Add nd (abbreviation for second) after 2, 22, and 32; add rd (abbreviation for third) after 3, 23, and 33 if the number ends in 3; add th (abbreviation for third) after all other endings. st, nd, th are ordinal word structures in English. Ordinal numbers are a type of numerals, mainly mentioned in English grammar, and expressed as "which number" in Chinese.

From the first to the nineteenth. Among them, one-first, the abbreviation of date is 1st; two-second, the abbreviation of date is 2nd; three-third, the abbreviation of date is 3rd; four-fourth; five-fifth; eight-eighth; nine-ninth; twelve- Twelfth is a special form, and other ordinal numbers are formed by adding "th" after the corresponding cardinal number.

In English, the names of months and days of the week are proper nouns. Their first letter must be capitalized, and no article is required before them. Express the date in English, the order is month + day + year, and the day and year need to be separated by commas. For example: August? 2nd, 2003 (August 2, 2003 represents the abbreviation of date. For example, the abbreviation of fifth is 15th, such as August 15, which can be written as: 15th, August.

Date: expressed as ordinal words. For example: October 1st is written as: October 1, October 1st, 1 October, 1st October, (the) 1st of October, etc. October can be written in the abbreviated form Oct. It is pronounced as: October the first or the first of October.

Ordinal numbers can be used as subjects, objects, attributives and predicates in sentences.

The second is what I really need. The second is what I really need (as the subject). .

He chose the second.

We are to carry out the first plan. ).

She is the second in our class.