Too goes before adjectives and adverbs. It has a negative meaning and shows that something is more than enough, more than necessary or more than wanted.

too + adjective/adverb + to –infinitive.
Helen is too rude to become a doctor.
He is too old to play football with the kids.

Enough goes before nouns but after adjectives or adverbs. It has positive meanings and shows that there is as much of something as is wanted or needed.

Adjective/adverb + enough + to –infinitive
The weather is warm enough to swim.
The shoes aren’t comfortable enough to walk for a long time.

enough + noun
There isn’t enough water.
We have enough money to buy a new car.

My English Pages: Too / Enough
Too vs. Enough
Exercise: Fill in the correct word (too / enough)
English exercises: Too/Enough activities
Agendaweb.org: Too/Enough exercises

The adverbs also, as well and too have similar meanings («in addition«), but they do not go in the same position in sentences.

English Practice: also, as well and too
Cambridge Dictionaries Online: also, as well or too?

Exercise: Also / Too /Either

English learners everywhere are confused about prepositions. We’re going to explore how the prepositions AT, ON, and IN are used with TIME and PLACE.

Prepositions Made Easy: In, On, and At
Prepositions of Place: at, in, on

Prepositions of Time: at, in, on

at, in, on – Prepositions in expressions of time – Exercise
Agendaweb.org: Prepositions of time
at, in, on – Prepositions of place– Exercise
Agendaweb.org: Prepositions of place

We use relative clauses to give additional information about something without starting another sentence. By combining sentences with a relative clause, your text becomes more fluent and you can avoid repeating certain words.

English Grammar Online: Relative Clauses

British Council: Relative Clauses

Perfect English Grammar: What is a relative clause?

Oxford University Press: Exercise

EnglishExercises.org

Exercise: Relative clauses & definitions