I read here that in first type of conditional sentences, simple future is used in the main clause. However, it was not clear if only will should be used or shall can also be used. For example below sentence, is that grammatically correct?

if I leave now, I shall reach on time

  • Shall reach doesn't work. You can use shall arrive, shall get there, or even shall be. (And shall works just as well as will. Which also has the same problem with the use of reach.) Commented Apr 29, 2019 at 11:27
  • @JasonBassford Thank you for your reply. Here my main concern is whether I can use "shall" in first conditional type of sentences or not?
    – pjj
    Commented Apr 29, 2019 at 11:39
  • I don't know much of anything about the so-called first to fourth conditionals. Those are guidelines that are never presented to native English speakers. They seem to have been made up for ESL grammar courses. (And they are often too rigid.) I do know that you can replace will with shall (at least when it comes to future intention or prediction) without a problem. It might sound a little archaic, but it's acceptable. Commented Apr 29, 2019 at 11:47
  • @JasonBassford Ah, I see, you are a native English speaker. I am a non-native English speaker and want to learn the grammar rules from international English exams perspective.
    – pjj
    Commented Apr 29, 2019 at 12:20

1 Answer 1


It is perfectly fine to use shall with the main clause of the first conditional. For example, the below sentence is grammatically correct.

if we don’t hurry, we shall miss the train

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