Shall I put "will" in these two following sentences?

Students who (will) graduate tomorrow will work in the factory three years later.

Police should make sure if there is(will be) terrorists tomorrow.

Thanks so much!

  • 1
    In the first sentence, will is not necessary between who and graduate. It is difficult to understand what you are trying to express in the second sentence. Why would police want to ensure that there are terrorists tomorrow? – P. E. Dant Sep 21 '16 at 21:10
  • Thanks so much! Because there will be a sports meeting tomorrow. And sorry for making a mistake! I mean Police should make sure if there is (will be) no terrorists tomorrow. Shall I put "will be"? – moyeea Sep 21 '16 at 21:25
  • For your first sentence, we don't use "will" when specifying something like that - it's just "the students who graduate tomorrow". For your second sentence, I think you mean "The police should make sure there are no terrorists", not "if there are no terrorists". – stangdon Sep 21 '16 at 21:27
  • You should use the edit link to add the word no to your question. See @stangdon 's astute comment: this misunderstanding of the use of if is common among new learners of English. – P. E. Dant Sep 21 '16 at 21:27
  • But can I say: Police should make sure whether there are terrorists or not tomorrow. Without" will" thanks so much! – moyeea Sep 21 '16 at 22:50

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