| |
| | Sequence of Tenses |
 | | Infinitives, too, have perfect tense forms when combined with "have," and sometimes problems arise when infinitives are used with verbs such as "hope," "plan," "expect," and "intend," all of which usually point to the future (I wanted to go to the movie. |
 | | Problems in sequencing tenses usually occur with the perfect tenses, all of which are formed by adding an auxiliary or auxiliaries to the past participle, the third principal part. |
 | | The past perfect tense designates action in the past just as simple past does, but the action of the past perfect is action completed in the past before another action. |
| owl.english.purdue.edu /handouts/grammar/g_seqtense.html (573 words) |
|