What exactly is a “morphological error”?

[Amerikanerin]

Greetings:
Please look at the following sentence:

“When did the test began?”

I feel that the use of the form “began” instead of the correct form “begin” is a classic example of a morphological error. However, I am having some difficulty understanding it clearly. If this is an example of a “morphological error”, can anyone give a clear and concise explanation of why it is so? Also, can anyone give a straightforward explanation of what is, in general tersm, a morphological error? Any postings are greatly appreciated.

[michael123]

I am English and I have never heard of a morphological error. You will probably never need to know.

On google I found the following:

morphologic: relating to or concerned with the formation of admissible words in a language

I assume therefore that a morphological error is an error in which a word has been incorrectly formed, i.e. incorrectly conjugated, but I may be wrong. If I am correct this would mean that any word to which the wrong form had been applied would be a morphological error.

Can you give an example of why you need to know? This might help me understand what you are looking for.

[xecole]

A morpheme is basically a part of a word that carries meaning, for example a prefix, suffix, inflection or stem. A morphological error would be, for example, if I wrote inusual instead of unusual. bagin for begin is a morphological error. So is began for begin.