CAT exam is having a English subject. This includes these topics:

Articles, Noun, Pronoun, Number, Case, Verb, Adjectives, Adverb, Non Finites, Prepositions, conjunction, Syntax, Synthesis, Reported speech, Transformation of sentences, special usage of certain words and their verb pattern, correction of errors.

Material for articles:

Article - 'A' - It is an indefinite article and is used before the singular countable noun starting with a consonant e.g. A ten Rupee note, a horse, a fine and vivid speech, A bird in the hand is worth two in the bush, A word to the wise is sufficient.

Exceptions - Although article 'A' is used before a consonant, but it is also used before a vowel, the sound of which begins like a consonant, for example -
A European, A University, ( E and U being pronounced as 'yu'), Similarly, if a consonant sounds like a vowel, article A will not be used before the said word e.g.An Honest person, An honour to the profession ( H of the honest and honour being pronounced as 'O' - Onest, Onour)

ARTICLE – ‘AN’ Again an Indefinite article, but is used before a word beginning with a vowel sound-

e.g. An umbrella, An honest man, An Hour, An Honour, An Heir ( The sound in the words beginning with H is of vowel – O, e, a,
ARTICLE ‘THE’ – It is the definite Article and has multi facet usage. It is expected from the students that while making any corrections, they should recall the following rules –
i) Used before the names of things unique of their kind in the Universe –The earth, the moon, the jupitar, the sky, the sun, the sea
ii) Used before superlatives - the best, the worst, the ugliest, the darkest
iii) Used before the Ordinal numbers – the seventh page of the chapter, the first man to set foot on the moon.
iv) Used before the names of famous/certain books – the Geeta, the Vedas, the Ramayana, the Illiad
v) Used before a certain place, person, thing or the one already referred to – The park, where the boy went, is a little far away, The chapter, you don,t want to study is very important, The dog is not traceable. ( The particular dog which we have been searching for sometime.)
vi) Used when the singular noun is supposed to represent the entire class –The banyan is a kind of fig tree, The cow is a useful animal ( Cows are useful animals), The rose has the sweetest fragrance of all flowers.
vii) Used before the names of certain proper nouns – the Ganga, the Yamuna, the Amazon, the Pacific, the Arabian sea, the Suez canal, the Sahara desert, the Andamans, the Himalayas,
viii) Used before the names of certain countries which include the words like Kingdom, Republic, group of islands, seat of Government – the United Kingdom, the Irish Republic, the Netherlands, the Hague( it is the seat of Government of the Netherlands)
ix) Used before a proper noun when it is qualified by an adjective- The immortal Kalidasa, the immortal Gandhi, the great Shakespeare, The Mrs. Gandhi, whose photo is on the wall, once stayed with our family.
x) Used before an Adverb with comparatives – The more you read, the more you understand, the more I get, the more I want
xi) Used before the musical instruments – I can play the guitar, he can play the flute.
xii) Used before a noun with the intention to give the force of superlative- The subject is the word that is to be followed by correct predicate. The assistant in this department is the person. (The key person who can get your work done)
xiii) Used sometimes before a common noun giving it a meaning of abstract noun – The beast in him was aroused by the violent action, The warrior in Hanuman was aroused at last.
xiv) Used before an adjective when the noun is understood –The rich should help the poor, The poor are with their leader.