diff --git a/src/cmd/asm/internal/asm/asm.go b/src/cmd/asm/internal/asm/asm.go
index 563e7947069..375ef803bb7 100644
--- a/src/cmd/asm/internal/asm/asm.go
+++ b/src/cmd/asm/internal/asm/asm.go
@@ -445,7 +445,7 @@ func (p *Parser) asmJump(op obj.As, cond string, a []obj.Addr) {
 			//   BC x,CR0EQ,...
 			//   BC x,CR1LT,...
 			//   BC x,CR1GT,...
-			// The first and second case demonstrate a symbol name which is
+			// The first and second cases demonstrate a symbol name which is
 			// effectively discarded. In these cases, the offset determines
 			// the CR bit.
 			prog.Reg = a[1].Reg
@@ -909,7 +909,7 @@ func (p *Parser) asmInstruction(op obj.As, cond string, a []obj.Addr) {
 	p.append(prog, cond, true)
 }
 
-// symbolName returns the symbol name, or an error string if none if available.
+// symbolName returns the symbol name, or an error string if none is available.
 func symbolName(addr *obj.Addr) string {
 	if addr.Sym != nil {
 		return addr.Sym.Name
diff --git a/src/cmd/asm/internal/asm/parse.go b/src/cmd/asm/internal/asm/parse.go
index 37f8e6c0bcc..c504e7eeab3 100644
--- a/src/cmd/asm/internal/asm/parse.go
+++ b/src/cmd/asm/internal/asm/parse.go
@@ -928,7 +928,7 @@ func (p *Parser) funcAddress() (string, obj.ABI, bool) {
 }
 
 // registerIndirect parses the general form of a register indirection.
-// It is can be (R1), (R2*scale), (R1)(R2*scale), (R1)(R2.SXTX<<3) or (R1)(R2<<3)
+// It can be (R1), (R2*scale), (R1)(R2*scale), (R1)(R2.SXTX<<3) or (R1)(R2<<3)
 // where R1 may be a simple register or register pair R:R or (R, R) or (R+R).
 // Or it might be a pseudo-indirection like (FP).
 // We are sitting on the opening parenthesis.
@@ -1186,7 +1186,7 @@ func (p *Parser) registerListX86(a *obj.Addr) {
 	a.Offset = x86.EncodeRegisterRange(lo, hi)
 }
 
-// register number is ARM-specific. It returns the number of the specified register.
+// registerNumber is ARM-specific. It returns the number of the specified register.
 func (p *Parser) registerNumber(name string) uint16 {
 	if p.arch.Family == sys.ARM && name == "g" {
 		return 10