1. He [suggests/will suggest] that she should leave the house at once.
2. He [suggests/will suggest] that she shall leave the house at once.
3. He [suggests/will suggest] that she leave the house at once.
4. He [suggests/will suggest] that she leaves the house at once.
Which of the above sentences is NOT acceptable?
Thank you very much for your reply.
I think #1, #3 and #4 are acceptable.
I don't like #1 because it has suggest(s) and should. Those two words carry the same meaning and therefore are redundant together.
#2 is similar to #1 because shall and should are similar in meaning. (the other meaning of shall is will) Shall is rarely used in modern English, and overall I don't think #2 is very good. I wouldn't use it.
#3 is the best sentence and has the meaning that I think this exercise wants to express.
#4 is grammatically correct, but in that sentence suggest(s) means that he believes/wants us to believe that she always leaves the house at once when a certain situation arises.