You might think my reflexive answer to this would be, how about never?

你可能以为对这个问题应会，永远不会吧？

But we don't use a reflexive pronoun with prepositions of place.

但们不会把身代词和表示地点介词连用。

That means the star will make a small circle — what's called reflexive motion.

这意味着恒星会转出一个小圆圈——这被称为运动。

It's reflexive. So we don't need anything there.

它。们不需要任何东西。

It gets to the point where it's reflexive, automatic.

它达到了射性、动程度。

A reflexive pronoun describes the subject of a sentence.

身代词描述句子主语。

It isn't a reflexive verb in English.

它在英语中不身动词。

We use a reflexive pronoun in the first part of the sentence.

们在句子第一部分使用了身代词。

And interestingly this expression is usually reflexive so the subject and the object are the same.

有趣，这种表达通常身形式，所以主语和宾语相同。

Sometimes we use a reflexive pronoun without " by" .

有时们用身代词，不带by。

Startle syndrome, also called hyperekplexia, is a rare disorder in people's reflexive reactions to surprise or agitation.

惊吓综合征，也被称为过度兴奋症，一种罕见疾病，人们对惊讶或激动射性应。

Although it has other meanings, when used with a reflexive pronoun, it means alone or without help.

它还有其他意思，但当与身代词连用时，它意思独或没有帮助。

Okay, so we use a reflexive pronoun when it refers to the subject of a sentence or clause.

好，所以们用身代词指代一个句子或从句主语。

This usage may have the same meaning as " by" reflexive pronoun.

这种用法可能与by加身代词有相同意思。

We've learned when to use reflexive pronouns and when not to.

们学会了什么时候用身代词，什么时候不用。

But in the second part of the sentence, we don't use a reflexive pronoun in the prepositional phrase.

但在句子第二部分，们没有在介词词组中使用身代词。

Reflexive pronouns refer back to the subject of a sentence or clause.

身代词指代一个句子或从句中主语。

Another way is to measure the Doppler shift in a star's light due to reflexive motion as the planet orbits.

另一种方法测量恒星光线多普勒频移，这种频移由行星绕轨道运行时运动引起。

We make this meaning with " by" followed with a reflexive pronoun, such as " myself" or " yourself" .

们用" by" 后接身代词来表达这个意思，比如" 己" 或" 你己" 。

She'll need to use the reflexive pronoun " myself" .

她需要使用身代词“myself”。