UNIT 7In this unit, you will: 1. talk about people’s birthdays.2. express dates in English.3. learn to use English expressions for shopping.4. explore how and why people celebrate birthdays.Happy Birthday!How do we celebrate birthdays?SECTION ABIGQuestionWhy do we celebrate birthdays?IV. Grammar: Ordinal numbersWh-questions reviewWarming upSECTION A1 Warming upOrdinal numbersSECTION A2 When do we use ordinal numbers?DatesWe use ordinal numbers when giving a date.• Her birthday is on the 29th. (Twenty-ninth)• Their Independence Day is on the 4th of July. (Fourth of July)GrammarWhen do we use ordinal numbers?Sequence or OrderWe use ordinal numbers when we want to show the order or position of someone or something in a sequence.• Woodward United finished second in the league last year.• I came third in the race.• This is the first time it has happened.GrammarWhen do we use ordinal numbers?Floors of a building• Our office is on the ninth floor.• She lives on the second floor.GrammarWhen do we use ordinal numbers?GrammarBirthday Celebrations• A person’s 15th birthday is an important celebration in Mexico.• He had a huge party for his twenty-first birthday.When do we use ordinal numbers?Centuries• Shakespeare was born in the 16th century.• The Renaissance was a period in European history from the 14th to the 17th century.Grammar Spelling You can normally create ordinal numbers by adding -th to the end of a cardinal number.• Four – Fourth• Sixteen – SixteenthGrammarThe main exceptions are with the numbers 1, 2, and 3.• one – first• two – second• three – third Spelling Also you need to be careful with the spelling of some ordinal numbers:• five – fifth (not “fiveth”)• nine – ni...
