Cases of word usage

1) used with the present participle of another verb to form the continuous tenses (be)

2) the verb 'be' when used to join a subject to its compliment, as in 'The baby is a boy', 'It is Thursday today' (copula)

3) the '-ing' form of a verb when used as a noun, as in 'fond of swimming' (gerund)

4) (used with the past participle of another verb (e.g. moved, done) to form) a: the present perfect tense, b: the past perfect tense, c: the future perfect tense, d: the perfect conditional tense (have)

5) (of) the form of a verb used with or without 'to', e.g. 'let him go', 'allow hot to go' (infinitive)

6) a state of mind or spirit; one of the groups of forms that a verb may take to show whether things are regarded as certain, possible, doubtful etc (mood)

7) a very small bit; any (usually short) word that is not a verb, subject or object but is a necessary part of a phrase, sentence or verb (particle)

8) (of) a word or verb form showing that the action of a sentence is on the person or thing doing it (reflexive)

9) (used with forms of the verb 'be', e.g. 'is/was') true; like that; (used for emphasis) to such a large (or small) extent (that); that is why; with the result that (so)

10) tightly stretched or strained; very nervous or excited; a verb form that shows time (tense)