Other grammar points

adverbs:

'He speaks quick' or 'he speaks quickly' - which one is correct?

If you are not sure look at this PDF to learn how to correctly form adverbs.

To practice, you can look at this translation list PDF here, or test yourself on the translation list on Quizlet here. There is also an audio exercise here and a written exercise here.

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adjectives ending in 'ing' vs 'ed':

What is correct:  'I'm excited' or 'I'm exciting'?  'I'm bored' or 'I'm boring'?
The answer is it depends on the context:
Adjectives with the 'ed' ending are how a person feels.
Adjectives with the 'ing' ending are describing something else.

e.g. I'm excited because the news is exciting.
John is bored because the classes are boring.

Here is the list of all the common adjectives where these two endings are possible:
tired/tiring                                                    relaxed/relaxing
depressed/depressing                                 interested/interesting
annoyed/annoying                                       excited/exciting
worry/worrying                                            bored/boring
frightened/frightening                                disappointed/disappointing
confused/confusing                                     interested/interesting 
surprised/surprising                                    shocked/shocking
satisfied/satisfying                                       embarassed/embarassing
​amazed/amazing
​
Look here to test yourself.                             
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even though vs even if:

even though = 'despite the fact'  used to talk about when something is surprising.  
e.g. Even though the pitch went well, another agency got the contract.              
(in German = obwohl)
even if = 'whether or not' used to talk about something that may/may not happen or may/may not have already happened    (in German = auch wenn)
e.g. Even if he is late, the meeting still has to start on time.

Click here to practice.