If you mean "continuing in the same way":
* Uninterrupted - without any breaks or interruptions.
* Constant - happening or existing all the time.
* Sustained - continuing for a long time.
* Persistent - continuing to happen or exist for a long time.
* Monotonous - boring because of continuing in the same way.
If you mean "continuing in the same tone of voice":
* Monotone - speaking or reading in a flat, unchanging tone.
* Droning - speaking in a dull, monotonous voice.
* Deadpan - speaking or acting in a flat, unemotional way.
* Uninflected - not changing the pitch or tone of voice.
If you mean "continuing in the same way and with the same feeling":
* Consistent - always behaving or happening in the same way.
* Steady - continuing at a regular rate without changing.
* Unwavering - not changing or becoming weaker.
To give you the most accurate word, please provide more context about what you're trying to describe.