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It is possible that Native Americans originally have migrated
to the Western Hemisphere over a bridge of land that once
existed between Siberia and Alaska.
A. have migrated to the Western Hemisphere over a bridge
of land that once existed
B. were migrating to the Western Hemisphere over a bridge
of land that existed once
C. migrated over a bridge of land to the Western Hemisphere
that once existed
D. migrated to the Western Hemisphere over a bridge of land
that once existed
E. were migrating to the Western Hemisphere over a bridge
of land existing once
The answer is D for the reason:
This sentence uses the correct tense 'migrated' to
describe an action completed in the past.
My quetion is we say that we canuse present perfect tense to talk
about an action completed in the past but has some relevance in the
present. Will it not apply here ?
Actually I am a bit confused on when is present perfect correct as against
the usage of a past tense. Please explain...
to the Western Hemisphere over a bridge of land that once
existed between Siberia and Alaska.
A. have migrated to the Western Hemisphere over a bridge
of land that once existed
B. were migrating to the Western Hemisphere over a bridge
of land that existed once
C. migrated over a bridge of land to the Western Hemisphere
that once existed
D. migrated to the Western Hemisphere over a bridge of land
that once existed
E. were migrating to the Western Hemisphere over a bridge
of land existing once
The answer is D for the reason:
This sentence uses the correct tense 'migrated' to
describe an action completed in the past.
My quetion is we say that we canuse present perfect tense to talk
about an action completed in the past but has some relevance in the
present. Will it not apply here ?
Actually I am a bit confused on when is present perfect correct as against
the usage of a past tense. Please explain...
