'as far as' can have several meanings. A bus can take you as far as the nearest stop, but you will have to walk from there. (the bus can only take you so far, then you have to walk). As far as I am concerned, you can do it yourself. (in my opinion) 'as much as' again can mean different things depending on context. Take as much as you want. (help yourself to...) This car cost as much as my house. (comparing one thing to another) 'as soon as' again depending on context. Get here as soon as you can. (get here quickly) As soon as the TV show comes on let me know. (when something starts or begins) There are many more examples and contexts where you can use these phrases Hope this helps.