diff --git a/app/router/balancing.go b/app/router/balancing.go
index dae2da59f..73d3ac101 100644
--- a/app/router/balancing.go
+++ b/app/router/balancing.go
@@ -27,7 +27,7 @@ type Balancer struct {
 	override override
 }
 
-// PickOutbound picks the tag of a outbound
+// PickOutbound picks the tag of an outbound
 func (b *Balancer) PickOutbound() (string, error) {
 	candidates, err := b.SelectOutbounds()
 	if err != nil {
diff --git a/app/router/condition.go b/app/router/condition.go
index 30bdf6f05..499d47e96 100644
--- a/app/router/condition.go
+++ b/app/router/condition.go
@@ -149,7 +149,7 @@ type PortMatcher struct {
 	onSource bool
 }
 
-// NewPortMatcher create a new port matcher that can match source or destination port
+// NewPortMatcher creates a new port matcher that can match source or destination port
 func NewPortMatcher(list *net.PortList, onSource bool) *PortMatcher {
 	return &PortMatcher{
 		port:     net.PortListFromProto(list),
diff --git a/app/router/router.go b/app/router/router.go
index 85aab1571..0cafdc15f 100644
--- a/app/router/router.go
+++ b/app/router/router.go
@@ -126,7 +126,7 @@ func (r *Router) Close() error {
 	return nil
 }
 
-// Type implement common.HasType.
+// Type implements common.HasType.
 func (*Router) Type() interface{} {
 	return routing.RouterType()
 }
diff --git a/app/router/weight.go b/app/router/weight.go
index f60d24c71..ec7711b99 100644
--- a/app/router/weight.go
+++ b/app/router/weight.go
@@ -28,7 +28,7 @@ type WeightManager struct {
 	defaultWeight float64
 }
 
-// Get get the weight of specified tag
+// Get gets the weight of specified tag
 func (s *WeightManager) Get(tag string) float64 {
 	weight, ok := s.cache[tag]
 	if ok {
diff --git a/common/strmatcher/matchers.go b/common/strmatcher/matchers.go
index 79ed3c176..c5d6fcdfc 100644
--- a/common/strmatcher/matchers.go
+++ b/common/strmatcher/matchers.go
@@ -133,7 +133,7 @@ type MatcherGroupForRegex interface {
 	AddRegexMatcher(matcher *RegexMatcher, value uint32)
 }
 
-// AddMatcherGroup is a helper function to try to add a Matcher to any kind of MatcherGroup.
+// AddMatcherToGroup is a helper function to try to add a Matcher to any kind of MatcherGroup.
 // It returns error if the MatcherGroup does not accept the provided Matcher's type.
 // This function is provided to help writing code to test a MatcherGroup.
 func AddMatcherToGroup(g MatcherGroup, matcher Matcher, value uint32) error {