... x0 y0 w1 h1" alt="" L O N G M A NE N GLIS H GRAMMAR PRAC T IC E for intermediate students L. G. Alexander For more material and information, please visit www.tailieuduhoc.orgur ... English Grammar Practice has been designed tostand on its own. Students who require further grammatical information can refer to the LongmanEnglish Grammar. How ... '-ing' formVerb + the '-ing' formAdjectives, nouns and prepositions + '-ing'The toinfinitive or the '-ing' form?IndexKey For more...