English Ordinal Numbers: A Quick GuideVersión en línea Ordinal Numbers por Profesor Mijail Santiago 1 Slide 1: What are ordinal numbers? Ordinal numbers order or rank things. They tell position, like first, second, or third, rather than quantity. 2 Slide 2: Basic ordinal forms The most common forms are first, second, third, and then fourth, fifth, etc. These show order, not amount. 3 Slide 3: Forming ordinals (general rule) For many numbers, add -th to the cardinals: fourth, fifth, sixth. Irregulars exist for 1st–3rd and some teens. 4 Slide 4: Irregular ordinals Key irregulars: first, second, third. The rest follow the general rule, but twelfth, twentieth, etc., have unique forms. 5 Slide 5: Spelling quirks Endings vary: -st (1st), -nd (2nd), -rd (3rd), -th otherwise. Watch for eleventh, twelfth. 6 Slide 6: Common uses (dates and rankings) Use ordinals for dates: June 5th. For rankings: first place, second in a contest. 7 Slide 7: Ordinals in positions We describe positions in lines, floors, or lists: third row, fourth floor, or fifth item. 8 Slide 8: Dates and measurements Write 5th of May, 2024, or 5 May 2024 in British style. Hyphenation is usually not required. 9 Slide 9: Quick practice Fill in the blanks: 1) He finished ____ in the race. 2) Today is the fifth day. 10 Slide 10: Quick recap Remember: use first–third irregulars, add -th or -st/-nd/-rd, and apply correct date formats.
