a part vs. part [duplicate]

part (mass noun) is close to "some", it means some but not all thing.

a part (countable) is a separate piece of something that you can combine with other pieces.

It has been always a problem for me to choose the right one.

For example:

I think there's always a part of you that doubts what you're doing.

But I can say "some part of you always doubts," so then it is not a separate thing and then why "a part" was used in the sentence?


The following are some of the common definitions for part

  1. a piece or portion of a whole
  2. an integral constituent of something ⇒ dancing is part of what we teach
  3. an amount less than the whole; bit ⇒ they only recovered part of the money

Both part and a part can be used to refer to a discrete countable thing

We teach several skills. Dancing is part of what we teach.

We teach several skills. Dancing is a part of what we teach.

Dancing is a discrete thing but can take either construction.

And both part and a part can be used to refer to a more general portion of a thing that is not countable

Part of the food [or money, or care] will be devoted to the poor.

A part of the food [or money, or care] will be devoted to the poor.

The portion to be devoted is not defined in these sentences as comprising a specific discrete section or item, but either construction is clear and appropriate. The addition of the article a may give a slight connotation that the portion may already be determined, but not necessarily.

The term parts, on the other hand, almost always refers to discrete items.

Speaker A: Parts of our efforts have been highly successful.

Speaker B: Which parts?