add page start-forms.md
Grammar fix
add start-looking-ahead.md
pull origin
Merge from yiisoft
Merge branch 'master' of github.com:yiisoft/yii2
Merge branch 'master' of github.com:yiisoft/yii2
add start-databases.md
Grammar fix
Merge pull request #4639 from RichWeber/master

[ci skip][Uk][Guide] Add page translation