‘to be heard’ should be used in place of ‘to hear’. The bird (subject) is making the sound. Others (object) hear it. So, the use of passive voice is recommended.

(4). ‘Increases’ instead of increase. The expression 'The number of' is always used in a singular sense. So, singular verb 'increases' will be used.

(3). 'would in place of 'will'. The rules for change of narration require that the reported speech should take the past form in line with the reporting verb 'said'. 'Today' need not be changed to 'that day' as the sense conveyed is for the present day only.

(4). The word “news” is used in the singular form for both singular and plural purposes. So, the correct usage is “the news”.

(2). Change the gerund form “selling” into the infinitive form “to sell”.Decided to sell

(4). 'brings' in place of 'will bring'.Conditional words like; in case, when etc. are never followed by future words ( will or shall). Hence, delete “will” and use the Present Indefinite “brings”.

(3). 'put them' in place of 'put it'. Subject-Pronoun agreement error. With the plural subject “books” we will use the plural pronoun “them”.

(4). 'at' in place of “on”. An event/activity (dinner) takes place “at” certain time.

(4). ‘to live in’ in place of ‘live’. The correct prepositional phrase is “to live in”. The preposition “in” makes it clear that the hutment is small for people to live inside it.

(2). The auxiliry verb 'is' is missing before 'expected'.

(4) dramatists. Plural noun will be used on account of the quantifier “all”.

(3) he was. In the case of indirect form of narration, the reported speech 'he is busy' will change its tense as per the reporting verb 'told' (past)..

(1) 'After the problem was found'. or 'Having found the problem'.

(4) and I. Instead of objective pronoun case (me) we will use the subjective pronoun case (I) as the reference is made to the subject and not the object.

The correct expression is “She was as pretty as”. As ... as is a correlative conjunction used to indicate the equality or sameness of two things. Here the comparison is made between “she” and “other girls”. Since the first 'as' is there the second 'as' needs to be there too. 'She was as pretty as any other girl who had come to the party.'

(3) Constitutional law. Since all the other types are mentioned in the noun form, so the third one should be in the same form in order to maintain parallelism.

(3) 'that of the other women who had'. “That of “ will be used since the comparison is made between her wig and the hairdo of other women. The comparison cannot be between wig and the women.

(1) There is only a plantain. Here singular noun plantain is mentioned; so article “a” will be used.

(2) 'any other boy' Since the comparison is between Sunit and all other boys, the correct expression is “any other boy”.

(2) 'why she had not go to the school'. An interrogative reported speech changes to affirmative/negative in the case of indirect narration. Note that question mark is not and cannot be used here.

(1) Unlike his brother who did not wear his helmet. Instead of “like” we will use “unlike” as a contrast is being made.

(2) 'since neither he nor you' . Instead of objective pronoun case (him) we will use the subjective pronoun case (he) as the reference is made to the subject and not the object.

(1)If you read .Avoid unnecessary shifts in the pronoun person. The pronoun “one” is not compatible with “you” in the latter parts of the sentences.

 "If anyone has doubts in" is the correct phrase.The correct preposition phrase to be used is “doubts in”. Also, the statement is in the present tense.

(4) 'sings'. Indefinite pronoun ''each'' is always used in the singular sense; so the verb used will singular ''sings''.