Simple sentences:

A simple sentence has only one clause:

The children were laughing.
John wanted a new bicycle.
All the girls are learning English.

Compound sentences:

A compound sentence has two or more clauses:

(We stayed behind) and (finished the job)
(We stayed behind) and (finished the job), then (we went home)

The clauses in a compound sentence are joined by co-ordinating conjunctions:

John shouted and everybody waved.
We looked everywhere but we couldn’t find him.
They are coming by car so they should be here soon.

The common coordinating conjunctions are:

and – but – or – nor – so – then – yet

Complex sentences:

A complex sentence has a main clause and one or more adverbial clauses. Adverbial clauses usually come after the main clause:

Her father died when she was very young
Her father died (main clause)
when (subordinating conjunction)
she was very young (adverbial clause)

She had a difficult childhood because her father died when she was very young.
She had a difficult childhood (main clause)
because (subordinating conjunction)
her father died (adverbial clause)
when (subordinating conjunction)
she was very young (adverbial clause).

Some subordinate clauses can come in front of the main clause:

Although a few snakes are dangerous most of them are quite harmless
Although (subordinating conjunction)
some snakes are dangerous (adverbial clause)
most of them are harmless (main clause).

A sentence can contain both subordinate and coordinate clauses:

Although she has always lived in France, she speaks fluent English because her mother was American and her father was Nigerian
Although (subordinating conjunction)
she has always lived in France (adverbial clause),
she speaks fluent English (main clause)
because (subordinating conjunction)
her mother was American (adverbial clause)
and (coordinating conjunction)
her father was Nigerian (adverbial clause).

There are seven types of adverbial clauses:


  Common conjunctions
Contrast clauses  although; though; even though; while;
Reason clauses because; since; as
Place clauses where; wherever; everywhere
Purpose clauses so that; so; because + want
Result clauses so that; so … that; such … that
Time clauses when; before; after; since; while; as; as soon as; by the time; until
Conditional clauses  if; unless; provided (that); as long as

Complete the sentences with conjunctions.

Match conjunctions to functions.




Hello Mayela,

2 is correct - the question is formed from 'you would provide' (not 'you would *to provide'). 'not only' and 'but also' normally go just before the words they modify, whether nouns, verbs or prepositional phrases. 

Please note that this 'not only ... but also' is rather formal. In a less formal context, something like 'Could you also provide the address as well as the name?'

Best wishes,
The LearnEnglish Team

This mean I can not use it with a negative question sentence? Incorrect gramatical structure:

Q= Would you not only (to) provide the address but also the name...?
A= No, I can only provide the address or Yes, I can provide both.

Reformulating the sentence to an affirmative statement, the right gramatical structure, something like:

Q=Would you provide not only the address but also the name?
A= No, I can only provide the address (or No, I can provide only the address)
Yes, I can provide both

Thanks, please advise of your reply

Hi Mayela,

'not only' and 'but also' usually come just before the word they modify, but other positions are possible. This is especially true of 'only', which is often positioned before verbs or nouns (as in your second answer) with the same meaning.

I'm sorry if my answer was confusing, but to be honest, I'm not sure what you're asking here. The question (without the word 'to') and both of the answers in your first example conversation are grammatically correct. The same is true of your second conversation: the question and all of the answers are grammatically correct.

If I've misunderstood you, please ask again.

All the best,
The LearnEnglish Team

Hi Peter,
I'm currently studying for GMAT, and I'm very confused about the difference of "modifiers", "parts of speech", "sentence structure" and etc. could you please correct my thought (as explain below). It would be a great help, consolidating my knowledge.

I know there is 8 different parts of speech in English that forms the mere parts of English Language and every other forms such as gerunds are derived from them.
I also know that phrases are the basic particle of the English Sentences. Phrases are all in Structural Category and it can consist different nouns, verb, adjective, adverb, pronoun and preposition as long as there would be no sub/verb pair.
In phrases, the mentioned elements can play different roles (or functions).
Then, Clauses are consisted of several phrases to convey an idea or a meaning. (based on how they convey the meaning - partial or complete- we have two kind of clauses as Dependent and Independent Clauses). we can then form a sentence by applying at list one independent clauses.

I'm confused about certain sentences. Such as "In a multi-racial country such as Singapore, English is the lingua franca among people of different races. " I cannot be sure whether this is a simple sentence. If someone could be kind enough to throw me some light over this matter, it will definitely be of great help to me. I am looking forward to your reply. Thank you for your time.

Hello ColtraneYiu,

A simple sentence is one which has only one clause. Any clause must have, at a minimum, a subject and a predicate (verb). If you look at your sentence you will see that there is only one verb in the sentence: 'is'. Therefore the sentence has only one clause, and is a simple sentence.

Best wishes,


The LearnEnglish Team

Hello Peter,

Thank you so much for your reply.
I'm sorry for stealing your or others' time again, but I have some more questions in my mind right now. Would you please help me out one more time?

Let's look at this sentence.
"The computer, stored millions of valuable information, was destoryed by the fire. "
We can rewrite it like this:
"The computer, which had been stored millions of valuable information, was destroyed by the fire."
My question is that I'm not sure whether the first sentence is a complex sentence.

Let's look at the another sentence.
"Tired of his job, the man decided to resign. "
We can rewrite it like this:
"Being tired of his job, the man decided to resign. "
Then rewrite it again:
"The man, who was tired of his job, decided to resign. "
My problem is the same—whether the first sentence is a complex sentence?

Finally,this sentence.
"Exhausted, the bull stopped struggling. "
We can rewrite it as:
"Being exhausted, the bull stopped struggling"
"The bull, which was exhausted, stopped struggling. "

Same question again, whether the first sentence is a complex one?

BTW, if I made any mistake in these sentences, please let me know. I really want to improve my English, and I look forward to your reply. Thank you again.

Best wishes,


Hello Coltrane,

As I understand it, all of those sentences are complex because reduced relative clauses (e.g. 'tired of his job', 'being exhausted', etc.) can be considered clauses.

All the best,
The LearnEnglish Team

Hi Kirk and Peter,

I can't thank you two enough. It's been a big help.

Best wishes,

Hi the LearnEnglish Team,
May I know this sentence "she is tall and long dark hair." is correct or not? How can I use the conjunction And? Thanks so much for your help!