Single sentence grammatical fill in the blank? A grammatical fill in the blank

i received a letter containing some

important information about theproject.

The stem of in this sentence is i received a letter

contain some information as a definite modifier.

letter, letter is also the logical subject of contain, that is, the letter contains

Some information, you can't use predicate verbs to make definite words, you have to use non-predicate verbs, the logical subject-verb relationship uses the verb ing form, and the verb-object relationship will use the verb ed form, so you can only fill in the containing here, but not contained.

The logical subject of contain is letter, that is, it is in the active voice, so it is passively completed with requirements.

There is a difference between even if and even though:

Even if generally leads to things that are not well grasped or hypothetical, even though leads to facts.

For example: even if we achieve greatest success in our work, we should not be proud

Even if we have achieved great results in our work, we should not be complacent.

even though he was late, he was not criticized by the teacher．

Although he was late, he was not criticized by his teacher.

even though he knows it, he'll not let out the secret.

He knows the secret).

even if he knows it, he'll not let out the secret.

Not sure if he knows the secret).

though often denotes some information that has already been determined, while if is an uncertainty about the hypothetical information by the meaning of "if" itself.

The first one is empty, and the second one is empty

The words many and each mean "each", but there are differences.

Many emphasizes generality, referring to each of the "whole", and there is no special restriction on the "whole" here, so it emphasizes the general.

Each is more special and refers to each of the "special wholes", and the "special whole" here must have special instructions before and after, so the particularity is more emphasized.

The meaning in the first sentence should be everyone, and there is no special restriction on this whole, that is, every person in general, so use every

Later in the second sentence, man and woman in the room are mentioned, so it is a special whole, so each is used

The first one fills in, emphasizing the individual in the whole.

The second fills in every, emphasizing the whole, and there are individuals who embody the whole.

every first generalized infinite definite ; Each of the second modifiers is limited to each in the room.