《Bicycle riding is good exercise》SectionB PPT-302edu教育资源网

《Bicycle riding is good exercise》SectionB PPT

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Word formation

useless adj.

use v.

→

useful adj.

careless adj.

care v.

→

careful adj.

helpless adj.

help v.

→

helpful adj.

Do you know the use of suffix “- less ”and“-ful”?

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