will + investigate -- We will investigate the allegations at our next meeting.
be+going to + investigate -- We are going to investigatethe allegations at our next meeting.
be + investigating -- We are investigating the allegations next month.
I will/shall investigate
It means, "Investigate/study the interrogative form of will [this could be a reference to the future tense] in English." In other words, "Study English questions in the future tense."
The present progressive tense of investigate is:I am investigating.You/We/They are investigating.He/She/It is investigating.
The present tense of investigating is:I/You/We/They investigate.He/She/It investigates.The present participle is investigating.
The past tense is investigated.
The past perfect progressive of investigate is had been investigating.
Were is a past tense form of be. The future tense of be is will be.
The present perfect progressive tense of "investigate" is "has been investigating."
past tense is got future tense is will get
Am, is, and are are present tense forms of be. The past tense forms of be are was and were. The future tense of be is will be.
The future tense is will carry.
The future tense of "was" is "will be."