whenever you see the helping verb have in any of its forms ( have, has, having, had), be sure that the verb that follows it is in the pas participle form
| They had walk to school |
should be had walked |
| we have see the show |
should be have seen |
| he has took the test |
should be has taken |
| having ate, he went to school |
should be heaving eaten |
| she should have did the work |
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in addition, you should be sure that if you have a subject and a past participle, you also have the verb have, This problem is particulary common with those verbs (such as sing,sang, sung), that change from present to past participle by changing onlu the vowel
| My frind sung in the choir |
should be sang or has sung |
| he become angry at his firnd |
should be became or has become |
| the boat sunk in the ocean |
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the following chart outlines the use of verb forms after have
| Verb FORMS AFTER HAVE |
| HAVE + past participle |
the following are examples of each of these verbs forms as they are used in this text :
| Base Form |
Present |
Present Participle |
Past |
Past Participle |
| walk |
walk(s) |
walking |
walked |
walked |
| hear |
hear(s) |
hearing |
heared |
heared |
| cook |
cook(s) |
cooking |
cooked |
cooked |
| sing |
sing(s) |
singing |
sang |
sung |
| come |
come(s) |
coming |
came |
come |
| begin |
begin(s) |
beginning |
began |
begun |