GRANT SELECT ON [dbo].[someTable] TO [aUser];

REVOKE SELECT ON [dbo].[someTable] TO [aUser];
--REVOKE SELECT [dbo].[someTable] FROM [aUser]; is equivalent

DENY SELECT ON [dbo].[someTable] TO [aUser];

--implicitly map this user to a login of the same name as the user
CREATE USER [aUser];

--explicitly mapping what login the user should be associated with
CREATE USER [aUser] FOR LOGIN [aUser];

CREATE ROLE [myRole];

-- SQL 2005+
exec sp_addrolemember @rolename = 'myRole', @membername = 'aUser';
exec sp_droprolemember @rolename = 'myRole', @membername = 'aUser';

-- SQL 2008+
ALTER ROLE [myRole] ADD MEMBER [aUser];
ALTER ROLE [myRole] DROP MEMBER [aUser];

{GRANT| REVOKE | DENY} {PERMISSION_NAME} [ON {SECURABLE}] TO {PRINCIPAL};