英语frequently是什么意思(often后接动词的什么形式)
often后通常接动词原形或动词的第三人称单数。如果often所在句子是一般过去时,表示某人过去经常做某事,那often后要接动词的过去时。通常often用于一般现在时,表示某人经常做某事。既然提到了often,下面来介绍一下often这个词:

often
often是个副词,其含义为“经常;往往;常常;时常;大多”。
例句:
People are often afraid of things they don't understand.
人往往对自己不懂的东西感到恐惧。
The disease often remains undetected for many years.
这种疾病经常潜伏多年而不被察觉。

every so often
这里介绍一个和often有关的习语:every so often。
every so often的意思是“有时;偶尔”,当你想用英语表示某人有时做某事,就可以用这个习语来形容。
例如:
She's going to come back every so often.
她会偶尔回来的。

often和frequently的区别
frequently也有“经常”的含义,那它和often之间有什么区别呢?
often通常是指某事有规律性地或频繁地发生。而frequently通常用于强调次数多、间隔短。
例句如下:
The new copier is frequently out of order.
这台新复印机经常出故障。
Alice often comes to help me.
爱丽丝常来帮助我。