[Grammar] Having said that

[newkeenlearner]

Hello,

The diet can make you slim without exercise. Having said that, however, exercise is important too.

Does "Having said that" work generally like "however"?
Can we use "having say this" too?

 

[Rover_KE]

Does "Having said that" work generally like "however"? Yes.
Can we use "having say this" too? No.

`

 

[GoesStation]

Hello,

[STRIKE]The d[/STRIKE] Diet can make you slim without exercise. Having said that, however, exercise is important too.

See above.

 

[newkeenlearner]

See above.

http://www.ldoceonline.com/dictionary/having-said-that