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regret doing/to do
regret to do 對要做的事遺憾。 (未做)
regret doing 對做過的事遺憾、後悔。 (已做)
I regret to have to do this, but I have no choice.
我很遺憾必須這樣去做，我實在沒有辦法。
I don't regret telling her what I thought.
我不為告訴她我的想法而後悔。
典型例題
——You were brave enough to raise objections at the meeting.
——Well, now I regret ___ that.
A. to do B. to be doing C. to have done D. having done
答案：et having done sth. 對已發生的事感到遺憾。regret to do sth. 對將要做的事感到遺憾。本題為對已說的話感到後悔，因此選D.
感官動詞 + doing/to do
感官動詞 see, watch, observe, notice, look at, hear, listen to, smell, taste, feel + do 表示動作的完整性，真實性;+doing 表示動作的連續性，進行性
I saw him work in the garden yesterday.
昨天我看見他在花園裡幹活了。(強調"我看見了"這個事實)
I saw him working in the garden yesterday.(強調"我見他正幹活"這個動作)
昨天我見他正在花園裡幹活。
典型例題
1)They knew her very well. They had seen her ___ up from childhood.
A. grow B. grew C. was growing D. to grow
答案：A.因題意為，他們看著她長大，因此強調的是成長的過程，而非正在長的動作，因此用see sb do sth 的句型。
2)The missing boy was last seen ___ near the river.
A. playing B. to be playingC. playD. to play
答案A. 本題強調其動作，正在河邊玩，應此用see sb. doing sth句型。
一般將來時
1)shall用於第一人稱，常被will 所代替。
will 在陳述句中用於各人稱，在爭求意見時常用於第二人稱。
Which paragraph shall I read first.
Will you be at home at seven this evening?
2)be going to +不定式，表示將來。
a. 主語的.意圖，即將做某事。
What are you going to do tomorrow?
b. 計劃，安排要發生的事。
The play is going to be produced next month.
c. 有跡象要發生的事
Look at the dark clouds, there is going to be a storm.
3) be +不定式表將來，按計劃或正式安排將發生的事。
We are to discuss the report next Saturday.
4)be about to +不定式，意為馬上做某事。
He is about to leave for Beijing.
注意：be about to 不能與tomorrow, next week 等表示明確將來時的時間狀語連用。
be to和be going to
be to 表示客觀安排或受人指示而做某事。
be going to 表示主觀的打算或計劃。
I am to play football tomorrow afternoon.(客觀安排)
I'm going to play football tomorrow afternoon. (主觀安排)
