Here's a resource I found today for tackling certain grammar issues that looks reasonably easy to follow:
Purdue OWL
For example:
How and when to use commas:
Purdue OWL: Commas
Fused sentences:
Purdue OWL: Independent and Dependent Clauses
Making subjects and verbs agree:
Purdue OWL: Subject/Verb Agreement
Happy reading.![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Purdue OWL
For example:
How and when to use commas:
Purdue OWL: Commas
Fused sentences:
Purdue OWL: Independent and Dependent Clauses
Making subjects and verbs agree:
Purdue OWL: Subject/Verb Agreement
Happy reading.