Most people, even prolific authors, have difficulty constructing sentences to convey their intended meaning. It's a question of selecting the most suitable vocabulary, following the rules of grammar, and finding the best word order to make the sentence flow.
Here are some tips for writing sentences:
Here is an example of a long sentence written by a student. It has 53 words.
"Government funding is one of the major sources of income that keep the sport and recreation industry alive other than the funds that the industry receives from the government would have to rely so much on sponsors for money that the small business and local clubs and organisation would slowly just fade away."
This sentence could be broken into two as follows:
"Government funding and sponsorship are major sources of income for sport and recreation organisations. Income from these two sources helps to keep clubs and organisations from fading away."
Here is an example of a long sentence written by a student. It has 24 words.
"However, putting that aside, Marist Swimming Club has several strategies that the club has adopted to promote itself better and in a broader context." (24 words)
Removing unnecessary words the sentence becomes.
"However, Marist Swimming Club has adopted several strategies to promote itself better." (12 words)