Answers of Exercise 6(Advance Grammar)

61. Here ‘that’ should be ‘it’, because the use of ‘that’ is unidiomatic in this regard.
62. Here the indirect article ‘a’ has to be changed to ‘an’, because the word after it begins with a ‘vowel’ sound.
63. Wrong use of preposition ‘in’. Here the correct preposition after ‘insisted’ is ‘on’.
64. In this sentence ‘but’ is used as a preposition meaning ‘except’. As an object of this preposition, ‘he’ is to be changed to ‘him’.
65. Here present perfect continuous form is to be used. So ‘am playing’ is to be changed into ‘have been playing’.
66. Here ‘want’ is the action that happened later. So simple past tense (wanted) should be used to indicate it.
67. The sentence is correct.
68. ‘Would’ can never be used after ‘if’. So it should be ‘had studied’.
69. Here the antecedent of ‘who’ is ‘one’ which is singular. So it should be ‘plans’ instead of ‘plan’.
70. Here ‘lay’ is wrong. It should be ‘lie’.

Answers of Exercise 5(Advance Grammar)

51. The preposition ‘of’ is not necessary after the preposition ‘off’. So ‘of’ should be omitted.
52. Here carbon-di-oxide is a singular subject. So it should be ‘is’ instead of ‘are’.
53. This is a subject question. So the rule is (question word + subject + verb). So it should be ‘what happened’.
54. ‘Hardly never’ is a double negative and, therefore, is wrong. It should be ‘hardly ever’.
55. Here it should be ‘in. the rule for this is (one of the + superlative degree + noun + ‘in’ + singular count noun).
56. When there are two entities, ‘between’ is used, and when there are more than two, ‘among’ in used. So here ‘among’ has to be used.
57. The rule is –after ‘one of the’ there must be plural noun. So here it should be ‘scientists’.
58. ‘Either’ is used only for two items, and ‘any’ is used for more than two items. So here ‘either’ should be ‘any’.
59. The rule is (in need of + noun). So it should be only ‘repair’.
60. The correct pronoun should be ‘his’. ‘Each’ is singular, so ‘each’ must be followed by a singular verb and pronoun.

Answers of Exercise 4(Advance Grammar)

40. Here ‘lend’ or ‘loan’ should be used instead of ‘borrow’.
41. Here the subject is singular because ‘accompanied by’ is a prepositional phrase and has no effect on the verb. So ‘are’ should be ‘is’.
42. Possessive form is used before a gerund. So it should be “dog’s”.
43. ‘After walking’ is past in this sentence but ‘has been walking’ is present. So it should be ‘had been walking’.
44. The correct form is : (subject + be + used to + gerund) and (subject +used to +verb in simple form). Here only ‘used to’ is to be used, because ‘be’ is the simple form of verb.
45. Here for parallel structure ‘cruel’ should be changed to noun ‘cruelty’ because ‘strength’ and ‘power’ are nouns.
46. Here the verb ‘had worked’ should be modified by an adverb. So the correct form is ‘diligently’.
47. Here it should be ‘Hardly had he’. Because if an adverbial appears at the beginning of a sentence, the rule is : (adverbial + auxiliary + subject + verb . . .).
48. This is an embedded question: the rule is (subject + verb + question word + subject + verb). So, here it should be ‘he could have’.
49. Here ‘lack of sanitation’ is a singular subject. So the verb should be ‘is’ instead of ‘are’.
50. The rule is (look forward to + verb + ing). So ‘going’ should be used.

Answers of Exercise 3(Advance Grammar)

31. ‘than’ should be ‘from’. The correct idiom is ‘different from’
32. ‘Although’ should be ‘despite’. (despite + noun phrase)
33. Should be ‘lie’. ‘lie’ means ‘to rest’ while ‘lay’ means ‘to put something on a surface’.
34. ‘watched’ should be ‘watching’ to maintain parallelism with ‘standing’ and ‘talking’.
35. ‘it was delivered’ should be ‘he delivered it’. Because a person is the subject here and this subject must appear immediately after the comma.
36. ‘ate’ should be ‘eaten’. Because for parallel structure it requires ‘dressed’ and ‘eaten’.
37. ‘us them’ should be ‘them to us’. If the direct object and the indirect object are both pronouns, the rule generally used is: (subject + verb + direct object + for/to + indirect object.)
38. Should be ‘known for’. Here the use of ‘known about’ is unidiomatic.
39. ‘Rashed’ should be ‘Rashed’s’, because it is necessary to use the possessive case before a gerund.
40. Here ‘lend’ or ‘loan’ should be used instead of ‘borrow’.

Answers of Exercise 2(Advance Grammar)

21. ‘Neither’ must be followed by singular verb and pronoun in formal written English. So ‘were’ should be ‘was’.
22. Most adverbs of manner are formed by adding –ly to adjectives. So ‘different’ should be ‘differently’ to modify the manner in which the chair is shaped.
23. ‘because’ is a prepositional phrase, so ‘as evening’ should be ‘like evening’. ‘As’ acts as a conjunction, while ‘like’ acts as a preposition.
24. Here ‘raised’ should be used instead of ‘risen’. To ‘raise’ means to move to a higher place, while to ‘rise’ means to go up.
25. Adverb is used to modify an adjective. So ‘profound’ should be changed to adverb ‘profoundly’ which modifies adjective ‘disappointing’.
26. ‘was’ should be ‘were’. In the unreal condition (contrary to fact or hypothetical), the past tense form of ‘be’ is always ‘were’.
27. The clause ‘many people believed’ establishes a point of view in the past. ‘is’ should be ‘was’ to maintain the point of view.
28. A ‘verb word’ must be used in a clause after an impersonal expression. ‘is’ should be changed to ‘ be’ after the impersonal expression ‘it is essential’.
29. ‘living’ should be ‘live’. (subject + used to + verb in simple form)
30. ‘because’ should be ‘because of’. (because of + noun)

Answers of Exercise 1(Advance Grammar)

Answers with Explanations:
1. Should be ‘much home-work’ instead of ‘many home-work’. Home-work can never be plural and it is a non-count noun, so it must be preceded by ‘much’.
2. Should be ‘read’ instead of ‘was reading’. You have to use the simple past tense to indicate an action that happened later.
3. Should be ‘of going’. (think of or think about + verb + ing). Never use: (think + infinitive).
4. Should be ‘hasn’t it’ instead of ‘isn’t it’, because the auxiliary verb in the main clause is ‘has’.
5. Should be ‘I’ instead of ‘me’. You have to use subject pronouns after the verb ‘be’.
6. Should be ‘isn’t there’ instead of ‘isn’t it’, when ‘there appears in the subject position of the sentence, it is also used in the tag question.
7. Should be ‘so that’ instead of ‘so’. It is required to use ‘so that’ between a purpose clause and a result clause.
8. There must be agreement between subject and verb. ‘has’ should be replaced by have to agree with the plural subject ‘two of the students’.
9. Ideas in a series should be expressed by parallel structures. ‘writing’ should be ‘to write’ to provide parallelism with infinitives ‘to understand’ and ‘to read’.
10. Here ‘need’ should be changed to ‘needs’ because ‘diagnosis’ is a singular subject.
11. ‘was’ should be changed to ‘is’, because to express a scientific fact present tense is used.
12. A noun is needed after the article ‘a’. So ‘a necessary’ is to be changed into ‘a necessity’.
13. It is correct to use ‘its’ instead of ‘their’ because the antecedent is the ‘elephant’ which is singular.
14. ‘and’ joins equal sentence parts. So adjective ‘moist’ should be changed to noun ‘moisture’ to provide parallelism with noun ‘heat’.
15. ‘water’ is a singular subject, so verb should be singular (returns).
16. The gerund ‘using’ is unidiomatic here. It should be ‘use’.
17. The conjunction ‘so’ should be omitted from the sentence.
18. Here the adjective ‘dangerous’ is to be used to modify the noun ‘fireworks’.
19. You should use the present perfect tense ‘has been’ because the action of the verb began in the past, includes present, and is likely to continue into the future.
20. There must be agreement between subject and verb. ‘has’ should be ‘have’ to agree with the plural subject ‘so many people’.