You may also find information in the wills people left.
Depending on which County your ancestors lived in, you'll need to find which Court the wills were proved in.
Some of these are on findmypast.
Ancestry has the wills from The Prerogative Court of Canterbury.
As KGarrad has said, researching back beyond 1700 is not a simple task, and you will need to try and discover a range of documents in order to get evidence on which to base your family tree.
County Record offices in England hold a wealth of material, much of which will never get on-line.
The National Archives Discovery website is an umbrella site for many archives in England.
Try a search here:
https://discovery.nationalarchives.gov.uk/advanced-search