UNIT 5: INVENTIONS Bài 1: Put the verbs into present perfect tense have been has bought have owned has broken have had have had have seen have known have checked 10 has worked Bài 2: Put the verbs into the correct tense (simple past or present perfect) didn't have came was visited have never been have just cleaned Bài 3: Choose the best answer in the bracket has never seen dug for has just landed went I've wanted Have you already hasn't decided got 10 bought Bài 4: Identify and correct mistakes in the following sentences Did you ever eat Have you ever eaten since for Have you called Did you call Did you Have you done for since Bài 5: Complete the text with the correct form of the verbs (Past Simple or pr Perfect Simple) left haven't found have made have won won Bài 6: Choose the best answer to complete the sentence 1.c Remember + Ving: nhớ làm (ở khứ) D Avoid +Ving: tránh làm B Agree to V: đồng ý làm D Expect to V: mong đợi/ mong chờ làm Expect to be + PP: mong chờ làm D Finish + Ving: hồn thành làm C Forget + to V: qn làm (sự việc chưa xảy ra) 'Don't forget to v "dùng để nhắc nhở làm Bài 7: Choose the best answer in the bracket to complete the sentence to drink (Stop to V: dừng lại để làm gì) talking (Stop + Ving: ngừng làm đó) to tell (Regret + to V: lấy làm tiếc làm gì; Out of stock: hết hàng) spending (Regret + Ving: hối hận làm đó) to check (Remember to V: nhớ để làm (chưa xảy ra)) putting (Remember + Ving: nhớ làm đó) to work (Need + to V: cần làm (chủ động)) thinking (need + Ving (bị động)) to break (Mean + to V: ý định làm gì) 10 getting (Mean + Ving: có nghĩa là) Bài 8: Put the verbs in brackets in the correct form waiting to stay to be to find working going doing smoking to buy 10 to go Bài 9: Identify and correct mistakes in the following sentences to buy buying to buy buying to watch watching to go going Trying Try going togo to see to seeing to drive to driving apologized me apologized to me 10 learning to learn Bài 10: Complete the text by putting the verbs in the correct form, using ing or to to abandon to try swimming losing breaking to raise to postpone saying to be 10 to find Bài 11: Put the verbs in brackets in the correct form to meet to understand seeing to be to be to be to see to stay eating 10 going Bài 12: Complete the sentences with the verbs from the box going to win closing to smoke to talk read to change to stay to lose 10 watching Bài 13: Put the verbs in the brackets into either the past simple or present perfect tense have you tried did you start did you go have moved Have you had has been haven't seen was Have you spoken 10 has visited Bài 14: Complete the second sentence so that it has similar meaning to the first There's no point in trying to get Jim to lend you his car He regretted not inviting/ not having invited her to his birthday party It takes time and patience to master a second language After Mr Brown had been abroad for four years, he returned home as an excellent engineer 5 You won't have any difficulty (in) getting a ticket for the game Bài 15: Complete the text with the correct form of the verbs (Past Simple or Present Perfect Simple) have changed were didn't have weren't paid did were have changed have become 10 have created 11 have become 12 have also got ... định làm gì) 10 getting (Mean + Ving: có nghĩa là) Bài 8: Put the verbs in brackets in the correct form waiting to stay to be to find working going doing smoking to buy 10 to go Bài 9: Identify... to me 10 learning to learn Bài 10: Complete the text by putting the verbs in the correct form, using ing or to to abandon to try swimming losing breaking to raise to postpone saying to be 10 to... postpone saying to be 10 to find Bài 11: Put the verbs in brackets in the correct form to meet to understand seeing to be to be to be to see to stay eating 10 going Bài 12: Complete the sentences