Dạng 1: Dynamic charts

Important words

  1. increase/ grow/ rise/ go up - increase/ growth/ rise/ surge (n, sự tăng mạnh) - jump/ surge/ soar C1 (a sudden and great increase) (n, v)/ spike/ triple/ see a fourfold increase/ quadruple
  2. make a recovery to/ bounce back to
  3. decrease/ decline/ drop/ fall/ reduce/ dwindle - decrease/ decline/ reduction (n) - plummet (fall very quickly and suddenly) (n,v)/ plunge C1 (fall suddenly)/ shrink
  4. Fluctuate between/vary + in the range from…to…/hover around the 10% mark - (significant/ slight/ wild/ mild/ small) fluctuation/ variation
  5. Reach a peak of/ peak at/ hit a high of/ rise to a high of/ with a rise to a peak of
  6. Reach a low of/ hit a low of/ hit a trough of
  7. Remain/ stay (relatively/ comparatively/ virtually/ somewhat/ almost) unchanged/ stable/ the same/ reach a plateau/ hit a plateau of/ plateau at/ level off at
  8. Significant/ dramatic/ considerable/ sharp/ substantial/ remarkable
  9. Slight/ slow/ gradual/ consistent / progressive/ steady/ marginal (rất nhẹ)/ negligible (không đáng kể)/ minimal
  10. Moderate (vừa phải)
  11. Respectively/ in that order/ respective figures
  12. Similarly/ also/ meanwhile/ by contrast/ conversely/ however/ contrasting trend/ by stark contrast

Important structures

  1. How much/ how many/ why/ how often S V
  2. Overall, there were increases in the number/ figure/ amount/ proportion of…, with/ while… Compare.
  3. There was…, followed by a… (and a final… to)
  4. V + adverb, after which (and then)
  5. experienced/ saw/ witnessed/ went through, before ending/ finishing the period at
    1. was seen/ observed/ experienced
    2. … data, with a subsequent decrease/ increase/ levelling off and a final…