英文幾時用to-infinitive and gerund

Hi,
THE INFINITIVE
VERBS NORMALLY FOLLOWED BY THE INFINITIVE
A. The to-infinitive is used after the verbs in this group, without a preceding noun. The verbs marked * can also be followed by a 'that-clause'
Example:





VERB


TO-INFINITIVE



I hope...


to see you next week.




THAT- CLAUSE


I hope...

that I'll see you next week









afford
agree*
aim
appear †
arrange*
bother
care
claim*
condescend
consent
decide*
demand*
determine*
endeavour


fail
guarantee*
happen †
hasten
have (= be obliged)
hesitate
hope*
learn
long
manage
offer
prepare
pretend*
proceed


promise*
propose
prove (= turn out)
refuse resolve*
seek
seem †
strive
swear*
tend
threaten*
trouble
undertake
volunteer
vow*













† These verbs can only be followed by a 'that-clause' when they have the subject 'it'. e.g. It appeared that no-one had locked the door.
Examples:

He claimed to be an expert.
I managed to reach the top of the hill.
I know you're only pretending to love me!


She failed to explain the problem clearly.
The customs man demanded to search our luggage.
I can't afford to go out tonight.
_____________________________________
1) I am used to seeing him every Tuesday.
2) I look forward to seeing you soon.
3) I prefer swimming to cooking.
4) A key to staying healthy.
5) I am devoted to teaching.
________________________________________
Ar另外有咩字加 ly and ably,而有咩字五洗加ly eg: hard希望比多D字我參考
Adjectives as adverbs:
hard, loud, fast, early, late,slow, bad( American),
flat, tight
886

4) A key to staying healthy.
我想問呢...呢句句子無一個main verb
都一樣沒問題??