Sequence of Tenses in Indirect Speech

The tour guide told Sam: "You may get lost in this forest, so you should ask me before going."

- [x] The tour guide told Sam that she might get lost in that forest, so she should ask him before going.
- [ ] The tour guide told Sam that she may get lost in that forest, so she should ask him before going.
- [ ] The tour guide told Sam that she might get lost in that forest, so she ought to ask him before going.
- [ ] The tour guide told Sam that she may get lost in that forest, so she ought to ask him before going.
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1. The modal verb *may* is changed into *might* and *should* does not change in an indirect sentence.  
2. In the indirect speech sentence, the modal verb *may* should be changed into *might*.  
3. In the indirect speech sentence, the modal verb *should* does not change.  
4. In the indirect speech sentence, the modal verb *may* needs to be changed into *might*, and the modal verb *should* does not change.
