B4

I’m going to start off by saying that the easiest way to learn a new language is by taking formal classes.
(степени сравнения)

EASY

B5

Last year I took a 40-minute English class once a week and it was definitely worth the money.
(past simple, т.к. действие происходило в прошлом не связанном с настоящим)

TAKE

B6

If you do not have the time or money to attend classes, you can of course teach yourself any language you want.
(present simple, т.к. это общее утверждение)

NOT HAVE

B7

If you have absolutely no prior knowledge of the language you are trying to learn, start by buying the same textbooks that schools use.
(present continuous, т.к. говорится о языке, который вы пытаетесь выучить сейчас)

TRY

B8

What makes using textbooks such a great tool for learning is that they are written in a context that makes it easy to understand.
(present simple passive, т.к. общее утверждение и они написаны, а не сами что-то пишут)

WRITE

B9

Besides, you can use the Internet, which is the greatest resource of knowledge that mankind has ever had.
(present perfect, т.к. знание, которое человечество имело до настоящего времени. Процесс не завершён)

HAVE

B10

But remember! You will not get any better without speaking and listening to the language. No matter what path you take in learning a new language, this is by far the most important step.
(future, вы не станете (говорить) лучше без …)

NOT GET