The document discusses the proper use of the present perfect and past perfect verb tenses. The present perfect tense uses "have" or "has" with a past participle to refer to an action that began in the past and continues to the present without a specific time. The past perfect tense uses "had" with a past participle to refer to an action that occurred before another past action. It provides examples of each tense and notes they must be used correctly with other verb tenses, with the past perfect combining with a simple past tense and the present perfect with a simple present tense.

1. Find the error TOEFL questions
LEARNING SPACE
TOPIC: Verb tense: use “have” and “had” correctly
The auxiliary verb “has/ have” is used together with a past participle to form THE
PRESENT PERFECT TENSE. The present perfect tense refers to the period of time from the
past to the present, and does not refer to any specific time in the past.
Examples of present perfect verbs:
have received (I have received all the money for the uniform.)
has seen (She has seen the new books for the course.)
These sentences do not refer to any specific time. The events could have happened at any time
before now, so the present perfect tense is correct here.
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The auxiliary verb “had” is used together with a past participle to form THE PAST PERFECT
TENSE. The past perfect tense is used to refer to any activity that you want to say
happened before another activity or before a certain time in the past.
Examples of past perfect verbs:
had forgotten (I had forgotten to call them before I went to see them.)
had closed (When she arrived, they had already left and there was no one there.)
These sentences refer to the first of two events to take place in the past.
In the first sentence, first he forgot to call, and then he went to see them. So, the first action is
indicated by using the past perfect tense (had forgotten.)
In the second sentence, first he “they left” and then “she arrived”, but it was too late. So the first
action is indicated by using the past perfect tense (had already left.)
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NOTE THE FOLLOWING
The past perfect tense combines well with a simple past tense
CORRECT: I had forgotten to call them before I went to see them.
INCORRECT: I had forgotten to call them before I go to see them.)
The present perfect tense combines well with a simple present tense
CORRECT: I have visited the place where her father works.
INCORRECT: I have visited the place where her father worked.