2018-2019学年译林牛津版高中英语必修二教案(湖南专用):Unit3 Amazing people-grammar and usage
2018-2019学年译林牛津版高中英语必修二教案(湖南专用):Unit3 Amazing people-grammar and usage第3页

Had you ever visited the U.S. before your trip in 1992?

Yes, I had been to the U.S. once before in 1988.

USE 2

Duration Before Something in the Past (Non-continuous Verbs) With Non-progressive Verbs and some non-progressive uses of Mixed Verbs, we use the Past Perfect to show that something started in the past and continued up until another action in the past.

Examples:

We had had that car for ten years before it broke down.

By the time Alex finished his studies, he had been in London for over eight years.

IMPORTANT Specific Times with the Past Perfect

Unlike the Present Perfect, it is possible to use specific time words or phrases with the Past Perfect. Although this is possible, it is usually not necessary.

EXAMPLE:

She had visited her Japanese relatives once in 1993 before she moved in with them in 1996.

If the Past Perfect action did occur at a specific time, the Simple Past can be used instead of the Past Perfect when before or after is used in the sentence. The words before and after actually tell you what happens first so the Past Perfect is optional. Both sentences below are correct.

EXAMPLE:

She had visited her Japanese relatives once in 1993 before she moved in with them in 1996.

She visited her Japanese relatives once in 1993 before she moved in with them in 1996.

HOWEVER

If the Past Perfect action did not happen at a specific time, Past Perfect MUST be used at all times. Compare the two sentences below.

EXAMPLE:

She had never seen a bear before she moved to Alaska. Correct

She never saw a bear before she moved to Alaska. Not Correct

ACTIVE / PASSIVE FORMS of Past Perfect

EXAMPLES

George had repaired many cars before he received his mechanics license. ACTIVE

Many cars had been repaired by George before he received his mechanics license. PASSIVE

Step 2: Practice

1. Read Point 1 on page 48 to see which action happens first in the sentence given. Note that the past perfect tense is often used with the simple past tense. If one action happens before another in the past, the past perfect tense is used. So these two tenses are often used together.