The correct answer is ''have visited' should be 'visited'' because Present Perfect tense cannot be combined with a specific, definite past time expression like 'last year', which requires Simple Past tense instead. Present Perfect is reserved for actions with an unspecified time or continuing present relevance, while any sentence naming a precise past time, 'yesterday', 'last year', 'in 2015', must use Simple Past. This incompatibility between Present Perfect and definite past time markers is one of the most frequently tested tense-usage errors in competitive English exams.
The correct answer is ''is knowing' should be 'knows'' because 'know' is a stative verb describing a mental state rather than an action, and stative verbs are not normally used in continuous tenses in standard English. Other common stative verbs following this same restriction include 'believe', 'want', 'understand', and 'love', all of which typically resist the '-ing' continuous form even when describing something happening currently. Recognizing which verbs are stative, versus dynamic action verbs that freely take continuous forms, is a frequently tested vocabulary and grammar distinction.
The correct answer is ''friend' should be 'friends'' because the fixed construction 'one of my + plural noun' always requires a plural countable noun after the possessive, since the sentence identifies one person from within a larger group of friends, even though the true subject 'one' remains singular and takes the singular verb 'is'. This 'one of the plus plural noun' pattern is a frequently and consistently tested structure, distinct from ordinary singular-subject sentences, since the plural requirement applies specifically to the noun following 'of', not to the main verb.
The correct answer is ''since' should be 'for'' because 'since' introduces a specific starting point in time, such as a year or date, while 'for' introduces a span or duration of time, such as 'five years'. This is one of the most classic and frequently tested preposition pairs in English grammar, and confusing the two, using 'since' with a duration or 'for' with a specific point, is a very common error among learners. Remembering 'since 2010' but 'for five years' helps distinguish between these two related time prepositions.
The correct answer is ''are' should be 'is'' because 'furniture' is an uncountable noun in English, always treated as singular and therefore requiring the singular verb 'is', despite referring to multiple individual items like tables and chairs collectively. Other similarly uncountable nouns that are singular despite seeming to describe multiple items include 'equipment', 'luggage', and 'information', none of which can be pluralized with an '-s' ending. This uncountable noun category is a frequently tested source of subject-verb agreement errors.
The correct answer is ''were' should be 'was'' because 'neither' is a singular indefinite pronoun, and 'neither of the two roads' always takes a singular verb, 'was', regardless of the plural noun 'roads' that follows 'of'. This mirrors the identical singular treatment required for 'each of' and 'either of' constructions. Mistakenly pairing 'neither of' with the plural 'were' because of the plural noun that follows is one of the most frequently tested subject-verb agreement errors in competitive English exams.
The correct answer is ''enough intelligent' should be 'intelligent enough'' because 'enough', when used as an adverb modifying an adjective, must come after that adjective rather than before it, as in 'intelligent enough', 'good enough', or 'old enough'. This word order rule is the reverse of most other intensifying adverbs like 'very' or 'quite', which precede the adjective they modify, making 'enough' a notable exception frequently tested precisely because it violates the more familiar adverb-before-adjective pattern.
The correct answer is ''with' should be 'to'' because 'married' is conventionally followed by the preposition 'to' when specifying the person one is married to, as in 'married to a rich businessman', a fixed collocation that is one of the most commonly confused prepositional errors, especially among learners whose native languages use an equivalent of 'with' in this context. Remembering 'married to' as a fixed, non-negotiable pairing is essential for avoiding this frequently tested preposition mistake.
The correct answer is ''am agree' should be 'agree'' because 'agree' is a full lexical verb in English that expresses its own meaning without needing the auxiliary 'be', unlike its equivalents in some other languages. Saying 'I am agree' is a very common ESL error, since the correct form is simply 'I agree with your opinion', treating 'agree' just like any other ordinary present-tense verb such as 'I like' or 'I understand'. This is one of the most frequently corrected verb-usage mistakes in competitive English grammar sections.
The correct answer is ''is coming' should be 'was coming'' because in indirect speech, the Present Continuous tense of the original direct speech backshifts to Past Continuous when the reporting verb 'said' is in the past tense, following the standard sequence of tenses rule. The sentence incorrectly retains the present tense 'is coming' instead of correctly backshifting it to 'was coming', a common error when students focus only on changing 'that' clauses without also applying the necessary tense transformation required by indirect speech rules.
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