Grammar fix
highly effective
works very well
Very successful at achieving the desired result; something that really works well.
collocationB2common
Hear it in context
Notice where the phrase sounds natural.
- This new medicine is highly effective at reducing pain.daily life
- In my opinion, online courses can be highly effective for students who need a flexible schedule.IELTS speaking
Fix the pattern
Pattern: highly effective + noun / at + -ing
WrongIt's a high effective method.
RightIt's a highly effective method.
Use the adverb 'highly' (not 'high') before an adjective.
Patternhighly effective + noun / at + -ing
Use it right
Choose the version that sounds natural in speech.
'Highly effective' is the natural intensifier; 'exceedingly efficacious' is pompous.
Build natural chunks
Words that usually travel with it.
highly effectiveatextremelyprovenmethod
Don't confuse it
'Very effective' is common, but 'highly effective' sounds stronger and is often used in formal or academic contexts.