“ASP.NET web-based applications is my primary focus.”

Question

Is this grammatically correct? Should I use is instead of are?

ASP.NET web-based applications is my primary focus.

Answer 1

As others have stated, it would be normal to use are to agree with the plural subject applications. This is kind of a gray area, however, and arguments could made for either side. If you are taking the idea of "ASP.NET web applications" as a singular pursuit, then you could use is. The understanding would be that you are omitting some syntax, such as "Developing in [ASP.NET web app.ications]" ...

That said, in cases where you're unsure how to proceed, it is the simplest thing in the world to simply reverse the order of the sentence:

My primary focus is ASP.Net web-based applications.

Note that in a resume situation, although @masarah has advised you that "web-based" is a redundancy when talking about ASP.Net, it probably doesn't hurt to be a little redundant to drive home the point about them being web-based. You never know what sort of clueless HR person your resume may need to filter through before reaching someone who can make a decision about your skills, in which case the minor pleonasm is likely to go unnoticed.

Answer 2

In that sentence, it is correct to use are, not is.

I would rephrase the sentence as one of the following sentences.

ASP.NET is my primary focus.
Developing in ASP.NET is my primary focus.
Developing applications in ASP.NET is my primary focus.

Answer 3

If you are talking about plural "applications" like in your example, you should use are.

Also, off-topic: All ASP.NET applications are web-based, so you do not need to point that out specifically