CONDITIONALS

By Inma Duarte Rodríguez 📔📘📚
First of all we have to understand that conditionals sentences contain the conjuction "if". Native speakers often mix them:

• Mixed first conditional sentence: 

If + present simple - can /may/might/will/should + verb (infinitive)
If you give me some money, I can buy some milk
If I finish my homework, may I go out with my friends?

You can also use going to, as well as will
If you are going to the shop, can you buy me some cola?

Present perfect may also appear in the IF clause
If you have finished your work, you can go home

• Mixed third/second conditional

This combination describes an imagined event in the past and the present result
If + past perfect, would + verb (infinitive)
If he had taken the medicine, he wouldn't still be sick

• Mixed second/third conditional

This combination describes a situation which is never true, and the past consequence of this situation.

If + past simple, would have + verb (infinitive)

If you were better at speaking in public, the presentation would have been more successful

REFERENCES

https://www.examenglish.com/grammar/mixed_conditionals.htm

http://esl.fis.edu/grammar/rules/cond.htm