Unit 5, grade 10: Inventions – Looking Back
1.1. Task 1 Unit 5 class 10
These words below are compound nouns or noun phrases. Put them in the correct columns according to their stress patterns. The first one in each column is an example. (The words below are conjunctions or noun phrases. Put them in the correct column according to the type of stress. The first word in each column is an example.)
– The first column
+ washing machine
– Thesecond column
+ solar charger
+ correction pen
+ digital camera
1.2. Task 2 Unit 5 grade 10
Listen and repeat these words. (Listen and repeat these words.)
Click to listen
Complete these sentences using the words given in the box. Make changes where necessary. (Complete the following sentences using the words given in the box. Change where necessary.)
Guide to answer
1. Digital cameras are more economical than camcorders: You don’t have to buy film reels.
2. Our teacher gave us an exercise on modern inventions of the 21st century.
3. Modern inventions tend to be small and portable, so they can be used everywhere.
4. Even the best invention can have both advantages and disadvantages.
5. It is difficult to find high quality products that are not expensive.
3.1. Task 1 Unit 5 class 10
Read the following short exchange. Fill in the gaps with the present perfect or the present simple forms of the verbs in brackets. (Read the following short exchange. Fill in the blanks with the present perfect or simple present tense verbs in brackets.)
Guide to answer
2. haven’t planned
3. have wasted
4. don’t have
5. haven’t started
Kim: Help me, Eric. My party is next week and I haven’t planned the menu yet. I’ve wasted three worrying days, and I still don’t have any ideas. What should I do?
Eric: Don’t panic. Your guests haven’t started arriving yet, so ask everyone to bring something. Then you can order some pizza or buy spring rolls from a Vietnamese dish. Nobody says no to pizza or spring rolls, I’m sure.
3.2. Task 2 Unit 5 grade 10
Answer these questions, using the gerund or infinitive forms of verbs to describe functions or purposes. (Answer the following questions, using gerunds or infinitives to express a feature or purpose.)
first. What is a washing machine used for?
(What is the washing machine used for?)
2. What can a solar charger be used for?
(What can solar charging be used for?)
3. What do you use to listen to music and watch videos?
(What do you use to listen to music and watch videos?)
4. What is a correction pen used for?
(What is the eraser used for?)
5. What do you use a 3-D printer for?
(What do you use the 3D printer for?)
Guide to answer
1. A washing machine is used for washing clothes.
(The washing machine is used to wash clothes.)
2. A solar charger can be used for charging mobile devices.
(Solar charger can be used to charge mobile devices.)
3. I use a laptop (smartphone, ipad,…) to listen to music and watch videos.
(I use a laptop (smartphone, tablet…) to listen to music and watch videos.
4. A correction pen is used for covering a writing error.
(Erase pen is used to erase errors in handwriting.)
5. I use a 3-D printer for producing solid objects such as a cup and a spoon.
(I use 3D printers to make solid objects like cups and spoons.)
4. Practice Task 1
Rearrange the sentences to make meaningful sentences
Question 1: who/ Could/ invented/ tell/ the/ you/ me/ light/ bulb?
A. Could me you tell who invented the light bulb?
B. Could you tell me who invented the light bulb?
C. Could who you tell me invented the light bulb?
D. Could you tell me the who invented the light bulb?
Question 2: The/ that/ USB/ helpful/ stick/ love/ is/ I/ so/ it/ so/ much.
A. The USB stick is helpful so that I love it so much.
B. The USB stick is so helpful so much that I love it.
C. The USB is so helpful stick that I love it so much.
D. The USB stick is so helpful that I love it so much.
5. Practice Task 2
Choose the letter A, B, C or D to complete the sentences
Question 1: Digital cameras are a wonderful ___________.
A. invent B. invention C. invented D. inventing
Question 2: My computer makes a _______ low buzzing noise.
A. continue B. continue C. continue D. continuous
At the end of the lesson, you should remember:
– Pronunciation: stressed syllables
– Vocabulary: economical, inventions, portable, benefits, expensive
+ gerund usually goes after the preposition, modifies the verb in front
Structure: prep + V-ing
Ex: It is used for studying English. (It’s for learning English)
+ Infinitive with “to” follows a verb and expresses the purpose of the action.
Structure: V1 + to-V2
Ex: I go swimming to get fit. (I go swimming to keep fit)
+ Present perfect Used to describe an action that has been completed up to the present time without discussing its time
Structure: S + have/ has + V3/V-ed
Ex: They have lived here for 5 years. (They have lived here for 5 years now.)