Update README

Author: peacalm

README.md

@@ -4215,7 +4215,7 @@ Here are some explanations for these.
 Operations like `lua_isnumber`, `lua_pushinteger`, `lua_isstring` don't mean checking the value's type:
 
 * Values with type `number` can also get true of `lua_isstring`. (Number is also string)
-* There are no integer types in Lua. Values generated by `lua_pushinteger` has type `number`.
+* There are no integer types in Lua. Values generated by `lua_pushinteger` have type `number`.
 * Only values generated by `lua_pushinteger` can get true of `lua_isinteger`. (But get false after `lua_tostring`)
 * `lua_isnumber` gets true if the value is a real `number` or a `string` but convertible to number.
 
@@ -4249,7 +4249,7 @@ Operations like `lua_isnumber`, `lua_pushinteger`, `lua_isstring` don't mean che
 2. Number is also string.
 3. String is also number if it is convertible to number.
 4. String is always not integer.
-5. `lua_tostring` implicitly convert number to string.
+5. `lua_tostring` will implicitly convert number to string.
 
 #### More to say