EGP is an online grammar reference tool that categorises grammar items according to their CEFR level: A1, A2, B1, B2, C1 or C2.

It gives information about the different uses and functions of a form, plus example sentences. 

You have to register, but it's free.

There is a basic search function, and also an Advanced search that allows you to set a combination of filters to refine your search - for example, you can set the super category to future, and the sub-category to present continous for future use

https://languageresearch.cambridge.org/english-grammar-profile/egp-online​

I've made a short video to show you how to use EGP basics. Click on the play arrow to start: you can enter full screen mode at the bottom right.
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