* to-infinitive indicating a result Ex 1. They entered the room ,to find their valuables stolen. Ex 2. => They entered the room and found their valuables stolen. Ex 3. They entered the room, only to find their valuables stolen. Ex 4. => They entered the room, but found their valuables stolen. Ex 5. "He grew up to be president." * the underlined phrases are the subject of to-infinitive. Ex 6. This box is too heavy for her to lift. Ex 7. I was very glad for her to call in at home. Ex 8. I wouldn't stand any more for her to lie this time too. * When the subject of to-infinitive is the same with the subject of a main clause, we can't use the subject of to-infinitive as in Ex 9. Ex 9. To here him speak English, you would take him for a foreigner.
I came to know the followings. 1) You native speakers scarcely use to-infinitive indicating a result when the subject of to-infinitive is different form the subject of the main clause. So you use #5 rather than #4. 2) And never use "for" preceding the subject of to-infinitive indicating a result. So you might use #4, but you will never use #3.
3. The prisoners were transported to Siberia, for most of them to work in the salt mines there. 4. The prisoners were transported to Siberia, most of them to work in the salt mines there. 5. The prisoners were transported to Siberia, and most of them worked in the salt mines there.
Up to here, am I right? Thank you in advance for your help.
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ex. 1: This can be okay but only in certain very specific contexts. ex. 2: This is okay. ex. 3: This is okay. ex. 4: This is not right. The two parts of the sentence don't match logically. ex. 5: This is okay. ex. 6: This is okay. ex. 7: This is ungrammatical. ex. 8: Ungrammatical. ex. 9: This is okay.
You're trying to follow specific rules, but these grammatical constructions are typically governed by usage which has evolved over hundreds of years and does not follow specific rules. Some words are used in these types of constructions, others are not, and this is determined by tradition, not by rules. You just have to learn the usage by experience.
4. "The prisoners were transported to Siberia, most of them to work in the salt mines there." This sentence brings up a very complex part of English grammar. The general "rule" here is that a "to" infinitive phrase cannot function as the verb of a clause, with its own subject. So the following are all ungrammatical - in each of them the "to" infinitive phrase is trying to function as a verb of
A and B are okay. In these, the "to" infinitive phrase is not trying to function as the verb of a clause, with its own subject. In A, the second clause is "where unhappy girls...winter approached," not, "many of them to die of consumption." "Many of them...consumption" functions more like an afterthought.
In B, "many of them to die in the camps" is not functioning as the second clause,
D and E are okay. In them the "to" infinitive phrase functions as an afterthought, not as a second clause. In D and E and main idea is expressed very strongly in the first clause, with the infinitive phrase just an afterthought, not something of the importance of a second clause.
C is not right. Here the infinitive phrase has enough significance to qualify as a second clause, which it