tenses一問

1) Present Tense = is the tense (that is, the form of the verb) that may be used to express:

action at the present
a state of being;
an occurrence in the (very) near future; or
an action that occurred in the past and continues up to the present
Simple Present =present simple, which is used to describe both habits and or routines (I eat breakfast every morning at 6:30. I go to work every day), and general facts or the truth (The earth revolves around the sun); We use the present simple for thoughts and feelings. (Ex. I think so, I like it.) In the present simple, we use the verb without an ending. (Ex. I get the lunch ready at one o'clock, usually.) In the third person singular, (after he, she, it, your friend and etc.,) however, the verb ends in -s or -es. (Ex. It gets busy on the weekends. Sarah catches the early train.)
2) Present Participle = The Present Participle in English is active. It has the following uses:

forming the progressive aspect: Jim was sleeping.
modifying a noun, with active sense: Let sleeping dogs lie.
modifying a verb or sentence: Broadly speaking, the project was successful
3) Past Tense / Simple past is formed for regular verbs by adding –ed to the root of a word. Example: He walked to the store. A negation is produced by adding did not and the verb in its infinitive form. Example: He did not walk to the store. Question sentences are started with did as in Did he walk to the store?
4) Past Participle = the past participle has both active and passive uses:

forming the perfect aspect: The chicken has eaten.
forming the passive voice: The chicken was eaten.
modifying a noun, with active sense: our fallen comrades
modifying a noun, with passive sense: the attached files
modifying a verb or sentence, with passive sense: Seen from this perspective, the problem presents no easy solution.

2009-05-26 16:13:47 補充：
希望幫到你!! ^_^

There are more than 4 tenses.

Present tense = simple present tense

Present participle and past participle are not tenses.
They are the forms of a verb.
e.g.
"Working" is the present participle of the verb "work". "Worked" is the past participle of the verb "work".

A present participle 加 verb to be 可以構成 present continuous tense 或者 past continuous tense. e.g. is working, was working.

Present participle 和 past participle 可以單獨用, 係 adjective.

Present participle 同一個字(串法) , 可以係 gerund(動名詞)。