diff --git a/clang/docs/ClangFormatStyleOptions.rst b/clang/docs/ClangFormatStyleOptions.rst
--- a/clang/docs/ClangFormatStyleOptions.rst
+++ b/clang/docs/ClangFormatStyleOptions.rst
@@ -1315,6 +1315,22 @@
        longFunction( // Again a long comment
          arg);
 
+**CoroutinesTS** (``bool``)
+  If ``true``, C++ Coroutines TS keywords will be treated as keywords, not
+  identifiers, regardless of the language standard specified for formatting.
+  If ``false``, their formatting depends on the standard selected.
+
+  .. code-block:: c++
+
+     true, C++11:
+     co_yield ++i;
+
+     false, C++11:
+     co_yield++ i;
+
+     both true and false, C++20:
+     co_yield ++i;
+
 **Cpp11BracedListStyle** (``bool``)
   If ``true``, format braced lists as best suited for C++11 braced
   lists.
diff --git a/clang/include/clang/Format/Format.h b/clang/include/clang/Format/Format.h
--- a/clang/include/clang/Format/Format.h
+++ b/clang/include/clang/Format/Format.h
@@ -1111,6 +1111,21 @@
   /// \endcode
   unsigned ContinuationIndentWidth;
 
+  /// If ``true``, C++ Coroutines TS keywords will be treated as keywords, not
+  /// identifiers, regardless of the language standard specified for formatting.
+  /// If ``false``, their formatting depends on the standard selected.
+  /// \code
+  ///    true, C++11:
+  ///    co_yield ++i;
+  ///
+  ///    false, C++11:
+  ///    co_yield++ i;
+  ///
+  ///    both true and false, C++20:
+  ///    co_yield ++i;
+  /// \endcode
+  bool CoroutinesTS;
+
   /// If ``true``, format braced lists as best suited for C++11 braced
   /// lists.
   ///
@@ -1949,6 +1964,7 @@
            ConstructorInitializerIndentWidth ==
                R.ConstructorInitializerIndentWidth &&
            ContinuationIndentWidth == R.ContinuationIndentWidth &&
+           CoroutinesTS == R.CoroutinesTS &&
            Cpp11BracedListStyle == R.Cpp11BracedListStyle &&
            DerivePointerAlignment == R.DerivePointerAlignment &&
            DisableFormat == R.DisableFormat &&
diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -434,6 +434,7 @@
     IO.mapOptional("ConstructorInitializerIndentWidth",
                    Style.ConstructorInitializerIndentWidth);
     IO.mapOptional("ContinuationIndentWidth", Style.ContinuationIndentWidth);
+    IO.mapOptional("CoroutinesTS", Style.CoroutinesTS);
     IO.mapOptional("Cpp11BracedListStyle", Style.Cpp11BracedListStyle);
     IO.mapOptional("DerivePointerAlignment", Style.DerivePointerAlignment);
     IO.mapOptional("DisableFormat", Style.DisableFormat);
@@ -701,6 +702,7 @@
   LLVMStyle.ConstructorInitializerAllOnOneLineOrOnePerLine = false;
   LLVMStyle.ConstructorInitializerIndentWidth = 4;
   LLVMStyle.ContinuationIndentWidth = 4;
+  LLVMStyle.CoroutinesTS = false;
   LLVMStyle.Cpp11BracedListStyle = true;
   LLVMStyle.DerivePointerAlignment = false;
   LLVMStyle.ExperimentalAutoDetectBinPacking = false;
@@ -2378,6 +2380,8 @@
   LangOpts.ObjC = 1;
   LangOpts.MicrosoftExt = 1;    // To get kw___try, kw___finally.
   LangOpts.DeclSpecKeyword = 1; // To get __declspec.
+  if (!LangOpts.CPlusPlus2a)
+    LangOpts.Coroutines = Style.CoroutinesTS;
   return LangOpts;
 }
 
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -13810,13 +13810,17 @@
 TEST_F(FormatTest, Coroutines) {
   FormatStyle Cpp20 = getLLVMStyle();
   Cpp20.Standard = FormatStyle::LS_Cpp20;
+  FormatStyle Coro = getLLVMStyle();
+  Coro.CoroutinesTS = true;
 
   verifyFormat("co_yield++ i;");
   verifyFormat("co_yield ++i;", Cpp20);
+  verifyFormat("co_yield ++i;", Coro);
 
   verifyFormat("co_await[]() { co_return; }\n"
                "();");
   verifyFormat("co_await []() { co_return; }();", Cpp20);
+  verifyFormat("co_await []() { co_return; }();", Coro);
 }
 
 } // end namespace