詢問現在完成進行式問題

The present perfect continuous tense shows that the action of providing money began in the past, has extended up to the present, and may continue in the future.(=to send a cheque)
eg:-I have been providing assistance for black people whenever they need it.
eg:-I have been providing assistance for black people whenever possible.
The conjunction at any time, on any occasion,at any spending rate, must be added for the tense.
As an adverb on whenever:-
eg:-Whenever did you find time-energy to do all that big spending ???
Since their rate of money-spending each are different, the present perfect continuous tense does indicate the possiblility of continuation in the future only lee. Otherwise the present tense is a general fact for you lee.

單從 grammar 看, 幻想有用不完財富, 是 OK

用 zero article, black people 是指所有的黑人,. ~ reference to a general class of people

回答者這句思維出問題
“I have been providing assistance for black people whenever they need it.”
~ 有問必應? 無限量援助?

I always try to provide financial assistance to 100 black people if possible.

2015-03-16 07:53:20 補充：
發問者句子 "I have been providing assistance for black people."
~ grammar 錯, 不是 tense 錯, 是用錯 preposition

I have been providing assistance to black people. ~ grammar OK, 不理其他的資料, 聽者信不信你講是另外一回事

Present Perfect Continuous Tense

以前開始做，直至現在仍然在做〔含意上會持續做下去〕的情況下適用。

所以我覺得你的句子是對的。

也看看大家的意見。

2015-02-28 22:17:34 補充：
也看看：

http://hkdsefighter.blogspot.hk/2011/05/tensespresent-perfect-vs-present.html

http://www.englishpage.com/verbpage/presentperfectcontinuous.html

有問題.

因為你這個行為, 直到你現在說話的一刻, 仍然繼續, 已成為一個慣例, 所以要用現在式.

I provide money assistance to black people when they need....