Can you give us the definitions of those three terms as they are used in your course? And also an idea of the sorts of answers that are expected, for example, by giving us a multiple choice question to give us the general idea?
The FORM of "She used to have long hair." is
A. .... B. .... C. ....
And so on. It's so vague, one wants to say, "Well, I thin
0 Hi Arabella, we must be doing the same online course - try this for help 05000 02br 02br 00My name is Steve by the way. It is not as easy as I though!! 0250hrefhttp://usuarios.lycos.es/englishweb/grammarref.htm#used