Read the sentence. "I saw a mouse in the kitchen." Why is **a** used?, There is only one mouse in the world., The mouse was mentioned before., It is the first time the mouse is mentioned., The speaker knows exactly which mouse., Compare the sentences. "I saw a mouse in the kitchen." "The mouse ran behind the fridge." Why is **the** used in the second sentence?, The speaker doesn't know which mouse., The sentence is in the past., There is only one mouse., The mouse has already been mentioned., Read the sentence. "She's watching a film." Why is **a** used?, There is only one film., The speaker doesn't know which film., The film is famous., The film was mentioned before., Look at the examples. "I'm a doctor." "He's an artist." What do **a** and **an** introduce here?, Jobs., Sports., Rivers., Countries., Read the sentence. "I can see the Sun." Why is **the** used?, The speaker doesn't know which Sun., It is a job., There is only one Sun., The Sun was mentioned before., Look at the examples. "the Pacific Ocean" "the River Danube" "the United Kingdom" What do these names have in common?, They all use **the**., They all use **a**., They never use an article., They are all cities., Read the sentence. "Ali was the greatest boxer." Why is **the** used?, Because it is the first mention., Because **greatest** is a superlative., Because the speaker is unsure., Because boxer is a job., Look at the examples. "the first" "the only" What do these expressions have in common?, They use **a** before defining expressions., They describe jobs., They never use an article., They use **the** before defining expressions., Compare the sentences. "Elephants are bigger than lions." "I bought six bottles of water." Why is there no article?, The nouns are countries., The nouns are used in a general way or are plural., The nouns are unique., The nouns were mentioned before., Look at the examples. "I live in Paris." "I like tennis." What do these examples have in common?, They always use **a**., They always use **the**., They normally use no article., They describe rivers., Compare the expressions. "in the morning" "on Monday" What is different?, Only the first expression uses **the**., Neither expression uses an article., Both expressions use **the**., Both expressions use **a**., Choose the best conclusion. What mainly determines whether we use **a/an**, **the** or no article?, Whether the noun is easy to pronounce., The length of the noun., The number of words in the sentence., The meaning and context.

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