Sadra English book offers a fast way to improve your English proficiency.
For more help on preparing for IELTS and TOEFL.

✔ 504 Absolutely Essential Words, full text translated
42 lessons, each introducing 12 new words

✔ Grammar, with Farsi translation :
Sentences
Pronouns
Adjectives
Conditional
Reported Speech
Articles
Tag Questions
Conjunctions
Adjective Phrases
Auxiliary Verbs
Causative
Participles

✔ Common words and their differences, like:
Afterwards-After *** Advice-Advise *** Bank-Seaside-Shore-Coast-Beach *** Costume-Custom *** Board - Get into - Get on - Get in *** Through-Across-Along *** Boundary-Frontier-Border *** Similar to - Similar - Alike - Like *** For-As-Since-Because *** Compliment-Complement *** Sickly-Patient-Ill-Sick *** Voyage-Trip-Journey-Travel *** Have on - Wear - Put on - Dress *** Great-Large-Big *** Clothes-Suit-Dress *** Let-Permit-Allow *** Reach-Get-Arrive *** Value-Cost-Price
and ...

✔ Idioms like:
A hot potato *** Bite the bullet *** Couch potato *** Shoot the breeze *** Add insult to injury
and ...

✔ Irregular Verbs


References:
www.merriam-webster.com
www.thefreedictionary.com
504 Absolutely Essential Words
http://learnenglish.britishcouncil.org


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