除了 concentrate 之外，attentive 與 focus 都可以用來表示專心或專注於某事物的意思。
專心英文造句練習
If you want to finish this job, you must concentrate on it.如果你想完成這項工作，你就必須專心。
Focus on entrepreneurship is the foundation of success.
專心創業是成功的基礎。
Many people can not concentrate on studying in a noisy environment.
許多人無法在吵鬧的環境專心念書。
I like to watch my child concentrate on thinking or play with toys.
我喜歡看我的孩子專心思考或玩玩具的樣子。
If you concentrate on thinking about one thing, you can always think more about it.
如果你專心去思考一件事情，你總是可以想得更周全。
It is impossible to "always be very attentive".
要「一直很專心」是不可能的。
Mike is very attentive to his thesis.
麥克很專心於他的論文。
Most people are particularly concentrated on what they are interested in.
大部分人對於自己有興趣的事情能夠特別專心。
I have to concentrate on this project.
我必須專心把這項企劃案完成。
If you do not concentrate, your work will not be perfect.
如果你不專心，你的作品將無法呈現完美狀態。