comment on 评论
I don't feel I can comment on their decision.

compare...to/with 把...比做，与...比较
My own problems seem insignificant compared with other people's.

concentrate on 集中精神，全神贯注
We need to concentrate resources on the most run-down areas.

confess to 承认，供认
She confessed to the murder.

confide in 信任，信赖，对...讲真话
It is important to have someone your confide in.

confine...to 把...限制在
The work will not be confined to the Glasgow area.

conform to 符合，遵照
He refused to conform to the local customs.

confront with 使面临，遭遇
Most people when confronted with a horse will pat it.

confuse...with 把...与...混淆
Be careful not to confuse quantity with quality.

congratulate...on （因某事向某人）祝贺
I congratulated them all on their results.

connect...with 把...与...联系起来
The canal was built to connect Sheffield with the Humber estuary.

consent to 同意，答应
He reluctantly consemted to his daughter's marriage.

consist in 在于
The beauty of the City consists in its magnificent buildings.

consist of 由...组成，由...构成
The committee consist of ten members.

consult with 同（某人）商议
I need to consult with my colleagues on the proposals.