英语中的五大时态及其标志词如下：

一般现在时

标志词：often, always, usually, sometimes, every day, once a week等

例句：She often goes to the gym.

一般过去时

标志词：ago, yesterday, last week, in 2022, last night, then等

例句：They went to the beach last weekend.

一般将来时

标志词：tomorrow, next week, in the future, will, shall等

例句：I will travel to Japan next year.

现在进行时

标志词：now, at the moment, at this time, currently等

例句：She is studying for her exams right now.

现在完成时

标志词：already, just, yet, ever, never, recently, so far等

例句：They have finished their homework already.

这些标志词可以帮助我们快速识别和判断句子所表达的时态，从而更准确地使用英语进行表达。