| I | prevent |
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| you | prevent |
| he/she/it | prevents |
| we | prevent |
| you | prevent |
| they | prevent |
| I | prevented |
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| you | prevented |
| he/she/it | prevented |
| we | prevented |
| you | prevented |
| they | prevented |
| I | have | prevented |
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| you | have | prevented |
| he/she/it | has | prevented |
| we | have | prevented |
| you | have | prevented |
| they | have | prevented |
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单语范例（未经PONS编辑处理）
Unfortunately this did not prevent subsidence and in 1973, subsidence of 5 feet occurred, leaving the house structurally unsound.
en.wikipedia.org Their attempts to prevent ratification ultimately failed by a narrow vote of 30 to 27.
en.wikipedia.org They would also observe that we spend millions to prevent death by disease and other causes.
en.wikipedia.org Further problems prevented work on the project from advancing beyond the 1864 stage for a decade.
en.wikipedia.org To prevent this effect, police should separate witnesses as early as possible before the reporting of the event.
en.wikipedia.org