As you asking I am telling Rajasthan Public Service Commission (RPSC) will publish date of Lower Division Clerk (LDC) exam so soon , till then to do study of this exam I am providing its syllabus :

GENERAL ENGLISH :
Tenses/Sequence of Tenses.
Voice : Active and Passive.
Narration : Direct and Indirect.
Transformation of Sentences : Assertive to Negative, Interrogative, Exclamatory and vice-versa.
Use of Articles and Determiners.
Use of Prepositions.
Translation of Simple (Ordinary/Common) Sentences from Hindi to English and vice-versa.
Correction of sentences including subject, Verb, Agreement, Degrees of Adjectives, Connectives
and words wrongly used.
Glossary of official, Technical Terms (with their Hindi Versions).
Synonyms.
Antonyms.
One word substitution.
Forming new words by using prefixes and suffixes.
Confusable words.
Comprehension of a given passage.
Knowledge of writing letters : Official, Demi Official, Circulars and Notices, Tenders.