You use already to show that a situation exists at this present moment or that it exists at an earlier time than expected. You use already after the verb 'be' or an auxiliary verb, or before a verb if there is no auxiliary. When you want to add emphasis, you can put already at the beginning of a sentence.
双语例句
例: The authorities believe those security measures are already paying off.
当局相信那些安全措施已经在起作用了。
例: He was already rich.
他早就富了。
例: Already, she is thinking ahead.
她早就在考虑未来了。