ืืืฆืจ ืืืืืื ืืืืื ื ืืืืชืจ ืืืืจืืช ืืื ืืืืช 4 ืืืืืืช. 25 ืืืืื ืฉืืืคืืขืืช ืฉืื ืืฉืื ืืืืืื C ืืืืืื ื ืืืจืืช, ืขื ืชืจืืื ืืืกืืจืื. ืืื ื ืืื ื ืืชืืืืื 4 ืืืืืืช.
achieve
ืืืฉืื โ ืืืืืข ืืืืจื.
consider
ืืฉืงืื, ืืืชืืืืก ื.
develop
ืืคืชื โ ืืืืื ืืืืชืงืื.
increase
ืืขืืืช, ืืืืืื.
decrease
ืืจืืช, ืืืงืืื.
improve
ืืฉืคืจ.
reduce
ืืืคืืืช.
affect
ืืืฉืคืืข ืขื.
effect
ืืฉืคืขื.
cause
ืืืจืื / ืกืืื.
result
ืชืืฆืื.
purpose
ืืืจื, ืืืจืช ืคืขืืื.
method
ืฉืืื.
society
ืืืจื (ืงืืืฆืช ืื ืฉืื).
environment
ืกืืืื.
experience
ื ืืกืืื / ืืืืื.
knowledge
ืืืข.
opinion
ืืขื.
according to
ืขื ืคื, ืืคื.
suggest
ืืืฆืืข, ืืืืืืฅ.
claim
ืืืขืื.
argue
ืืืขืื, ืืืชืืืื.
describe
ืืชืืจ.
compare
ืืืฉืืืช.
however
ืขื ืืืช, ืืขืืืช ืืืช.