diff --git a/timed_objects.py b/timed_objects.py
new file mode 100644
index 0000000..b1baa0a
--- /dev/null
+++ b/timed_objects.py
@@ -0,0 +1,27 @@
+from dataclasses import dataclass
+from typing import Optional
+
+@dataclass
+class TimedText:
+    start: Optional[float]
+    end: Optional[float]
+    text: Optional[str] = ''
+    speaker: Optional[int] = -1
+
+@dataclass
+class ASRToken(TimedText):
+    def with_offset(self, offset: float) -> "ASRToken":
+        """Return a new token with the time offset added."""
+        return ASRToken(self.start + offset, self.end + offset, self.text)
+
+@dataclass
+class Sentence(TimedText):
+    pass
+
+@dataclass
+class Transcript(TimedText):
+    pass
+
+@dataclass
+class SpeakerSegment(TimedText):
+    pass
\ No newline at end of file