只有多练习，才能说好中文。
zhǐyǒu duō liànxí ， cái néng shuō hǎo zhōngwén 。
Only by practising a lot can you speak Chinese well.
只有他才知道答案。
zhǐyǒu tā cái zhīdào dá'àn 。
Only he knows the answer.
只有周末我才有时间。
zhǐyǒu zhōumò wǒ cái yǒu shíjiān 。
I only have time at weekends.