How to Conjugate "Forecast" in English

by Craig Shrives

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Conjugation of "To Forecast"

The verb "forecast" is an irregular verb. (This means that "forecast" does not form its simple past tense or its past participle by adding "-ed" or "-d" to the base form.)

The Five Forms of "To Forecast"

FormforecastAlternative Name
Base FormforecastInfinitive Form
The -S FormforecastsThird Person Singular Form
Past Formforecast (also forecasted)Simple Past Tense
The -ING FormforecastingPresent Participle Form
The Past Participle Formforecast (also forecasted)[no alternative name]

"To Forecast" in All the Tenses

The tables below show how "forecast" conjugates in the past, present, and future tenses.

Past Tenses

PersonSimple PastPast Progressive TensePast Perfect TensePast Perfect Progressive Tense
  • I
  • you
  • he/she/it
  • we
  • you
  • they
  • forecast (also forecasted)
  • forecast (also forecasted)
  • forecast (also forecasted)
  • forecast (also forecasted)
  • forecast (also forecasted)
  • forecast (also forecasted)
The simple past tense is for a completed activity that happened in the past.
  • was forecasting
  • were forecasting
  • was forecasting
  • were forecasting
  • were forecasting
  • were forecasting
The past progressive tense is for an ongoing activity in the past. Often, it is used to set the scene for another action.
  • had forecast (also forecasted)
  • had forecast (also forecasted)
  • had forecast (also forecasted)
  • had forecast (also forecasted)
  • had forecast (also forecasted)
  • had forecast (also forecasted)
The past perfect tense is for emphasizing that an action was completed before another took place.
  • had been forecasting
  • had been forecasting
  • had been forecasting
  • had been forecasting
  • had been forecasting
  • had been forecasting
The past perfect progressive tense is for showing that an ongoing action in the past has ended.

Present Tenses

PersonSimple PresentPresent Progressive TensePresent Perfect TensePresent Perfect Progressive Tense
  • I
  • you
  • he/she/it
  • we
  • you
  • they
  • forecast
  • forecast
  • forecasts
  • forecast
  • forecast
  • forecast
The simple present tense is mostly for a fact or a habit.
  • am forecasting
  • are forecasting
  • is forecasting
  • are forecasting
  • are forecasting
  • are forecasting
The present progressive tense is for an ongoing action in the present.
  • have forecast (also forecasted)
  • have forecast (also forecasted)
  • has forecast (also forecasted)
  • have forecast (also forecasted)
  • have forecast (also forecasted)
  • have forecast (also forecasted)
The present perfect tense is for an action that began in the past. (Often, the action continues into the present.)
  • have been forecasting
  • have been forecasting
  • has been forecasting
  • have been forecasting
  • have been forecasting
  • have been forecasting
The present perfect progressive tense is for a continuous activity that began in the past and continues into the present (or finished very recently).

Future Tenses

PersonSimple FutureFuture Progressive TenseFuture Perfect TenseFuture Perfect Progressive Tense
  • I
  • you
  • he/she/it
  • we
  • you
  • they
  • will forecast
  • will forecast
  • will forecast
  • will forecast
  • will forecast
  • will forecast
The simple future tense is for an action that will occur in the future.
  • will be forecasting
  • will be forecasting
  • will be forecasting
  • will be forecasting
  • will be forecasting
  • will be forecasting
The future progressive tense is for an ongoing action that will occur in the future.
  • will have forecast (also forecasted)
  • will have forecast (also forecasted)
  • will have forecast (also forecasted)
  • will have forecast (also forecasted)
  • will have forecast (also forecasted)
  • will have forecast (also forecasted)
The future perfect tense is for an action that will have been completed at some point in the future.
  • will have been forecasting
  • will have been forecasting
  • will have been forecasting
  • will have been forecasting
  • will have been forecasting
  • will have been forecasting
The future perfect progressive tense is for an ongoing action that will be completed at some specified time in the future.

Most Common Irregular Verbs

The two most common irregular verbs in English are "be" and "have." These pages give more details about these two verbs: Here are the next 10 most common irregular verbs in English:

Most Common Irregular Verbs

The two most common irregular verbs in English are "be" and "have." These pages give more details about these two verbs: Here are the next 10 most common irregular verbs in English:

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See Also

Parts of Speech Lists 200 Important Irregular Verbs Role-Play Scenarios for English Learners

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